4 * FastCGI application library: request-at-a-time
7 * Copyright (c) 1996 Open Market, Inc.
9 * See the file "LICENSE.TERMS" for information on usage and redistribution
10 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14 static const char rcsid[] = "$Id: fcgiapp.c,v 1.31 2001/11/17 03:58:31 robs Exp $";
19 #include <fcntl.h> /* for fcntl */
21 #include <memory.h> /* for memchr() */
26 #include <sys/types.h>
28 #include "fcgi_config.h"
30 #ifdef HAVE_SYS_SOCKET_H
31 #include <sys/socket.h> /* for getpeername */
34 #ifdef HAVE_SYS_TIME_H
47 #define DLLAPI __declspec(dllexport)
56 * This is a workaround for one version of the HP C compiler
57 * (c89 on HP-UX 9.04, also Stratus FTX), which will dump core
58 * if given 'long double' for varargs.
60 #ifdef HAVE_VA_ARG_LONG_DOUBLE_BUG
61 #define LONG_DOUBLE double
63 #define LONG_DOUBLE long double
69 static int libInitialized = 0;
70 static int isFastCGI = -1;
71 static char *webServerAddressList = NULL;
72 static FCGX_Request the_request;
74 void FCGX_ShutdownPending(void)
79 static void *Malloc(size_t size)
81 void *result = malloc(size);
82 ASSERT(size == 0 || result != NULL);
86 static char *StringCopy(char *str)
88 int strLen = strlen(str);
89 char *newString = (char *)Malloc(strLen + 1);
90 memcpy(newString, str, strLen);
91 newString[strLen] = '\000';
95 int FCGX_Peek(FCGX_Stream * stream)
\r
97 if (stream->rdNext != stream->stop)
98 return *stream->rdNext;
\r
100 if (stream->isClosed || ! stream->isReader) return EOF;
\r
102 stream->fillBuffProc(stream);
103 stream->stopUnget = stream->rdNext;
\r
105 if (stream->rdNext != stream->stop)
106 return *stream->rdNext;
\r
108 ASSERT(stream->isClosed); /* bug in fillBufProc if not */
113 *----------------------------------------------------------------------
117 * Reads a byte from the input stream and returns it.
120 * The byte, or EOF (-1) if the end of input has been reached.
122 *----------------------------------------------------------------------
124 int FCGX_GetChar(FCGX_Stream *stream)
126 int rv = FCGX_Peek(stream);
\r
127 if (rv != EOF) ++stream->rdNext;
\r
132 *----------------------------------------------------------------------
136 * Reads up to n consecutive bytes from the input stream
137 * into the character array str. Performs no interpretation
138 * of the input bytes.
141 * Number of bytes read. If result is smaller than n,
142 * the end of input has been reached.
144 *----------------------------------------------------------------------
146 int FCGX_GetStr(char *str, int n, FCGX_Stream *stream)
154 * Fast path: n bytes are already available
156 if(n <= (stream->stop - stream->rdNext)) {
157 memcpy(str, stream->rdNext, n);
162 * General case: stream is closed or buffer fill procedure
167 if(stream->rdNext != stream->stop) {
168 m = min(n - bytesMoved, stream->stop - stream->rdNext);
169 memcpy(str, stream->rdNext, m);
176 if(stream->isClosed || !stream->isReader)
178 stream->fillBuffProc(stream);
179 stream->stopUnget = stream->rdNext;
184 *----------------------------------------------------------------------
188 * Reads up to n-1 consecutive bytes from the input stream
189 * into the character array str. Stops before n-1 bytes
190 * have been read if '\n' or EOF is read. The terminating '\n'
191 * is copied to str. After copying the last byte into str,
192 * stores a '\0' terminator.
195 * NULL if EOF is the first thing read from the input stream,
198 *----------------------------------------------------------------------
200 char *FCGX_GetLine(char *str, int n, FCGX_Stream *stream)
207 c = FCGX_GetChar(stream);
224 *----------------------------------------------------------------------
228 * Pushes back the character c onto the input stream. One
229 * character of pushback is guaranteed once a character
230 * has been read. No pushback is possible for EOF.
233 * Returns c if the pushback succeeded, EOF if not.
235 *----------------------------------------------------------------------
237 int FCGX_UnGetChar(int c, FCGX_Stream *stream) {
241 || stream->rdNext == stream->stopUnget)
244 *stream->rdNext = (unsigned char) c;
249 *----------------------------------------------------------------------
253 * Returns EOF if end-of-file has been detected while reading
254 * from stream; otherwise returns 0.
256 * Note that FCGX_HasSeenEOF(s) may return 0, yet an immediately
257 * following FCGX_GetChar(s) may return EOF. This function, like
258 * the standard C stdio function feof, does not provide the
259 * ability to peek ahead.
262 * EOF if end-of-file has been detected, 0 if not.
264 *----------------------------------------------------------------------
266 int FCGX_HasSeenEOF(FCGX_Stream *stream) {
267 return (stream->isClosed) ? EOF : 0;
271 *----------------------------------------------------------------------
275 * Writes a byte to the output stream.
278 * The byte, or EOF (-1) if an error occurred.
280 *----------------------------------------------------------------------
282 int FCGX_PutChar(int c, FCGX_Stream *stream)
284 if(stream->wrNext != stream->stop)
285 return (*stream->wrNext++ = (unsigned char) c);
286 if(stream->isClosed || stream->isReader)
288 stream->emptyBuffProc(stream, FALSE);
289 if(stream->wrNext != stream->stop)
290 return (*stream->wrNext++ = (unsigned char) c);
291 ASSERT(stream->isClosed); /* bug in emptyBuffProc if not */
296 *----------------------------------------------------------------------
300 * Writes n consecutive bytes from the character array str
301 * into the output stream. Performs no interpretation
302 * of the output bytes.
305 * Number of bytes written (n) for normal return,
306 * EOF (-1) if an error occurred.
308 *----------------------------------------------------------------------
310 int FCGX_PutStr(const char *str, int n, FCGX_Stream *stream)
315 * Fast path: room for n bytes in the buffer
317 if(n <= (stream->stop - stream->wrNext)) {
318 memcpy(stream->wrNext, str, n);
323 * General case: stream is closed or buffer empty procedure
328 if(stream->wrNext != stream->stop) {
329 m = min(n - bytesMoved, stream->stop - stream->wrNext);
330 memcpy(stream->wrNext, str, m);
337 if(stream->isClosed || stream->isReader)
339 stream->emptyBuffProc(stream, FALSE);
344 *----------------------------------------------------------------------
348 * Writes a character string to the output stream.
351 * number of bytes written for normal return,
352 * EOF (-1) if an error occurred.
354 *----------------------------------------------------------------------
356 int FCGX_PutS(const char *str, FCGX_Stream *stream)
358 return FCGX_PutStr(str, strlen(str), stream);
362 *----------------------------------------------------------------------
366 * Performs output formatting and writes the results
367 * to the output stream.
370 * number of bytes written for normal return,
371 * EOF (-1) if an error occurred.
373 *----------------------------------------------------------------------
375 int FCGX_FPrintF(FCGX_Stream *stream, const char *format, ...)
379 va_start(ap, format);
380 result = FCGX_VFPrintF(stream, format, ap);
386 *----------------------------------------------------------------------
390 * Performs output formatting and writes the results
391 * to the output stream.
394 * number of bytes written for normal return,
395 * EOF (-1) if an error occurred.
397 *----------------------------------------------------------------------
400 #define PRINTF_BUFFLEN 100
402 * More than sufficient space for all unmodified conversions
405 #define FMT_BUFFLEN 25
407 * Max size of a format specifier is 1 + 5 + 7 + 7 + 2 + 1 + slop
409 static void CopyAndAdvance(char **destPtr, char **srcPtr, int n);
411 int FCGX_VFPrintF(FCGX_Stream *stream, const char *format, va_list arg)
413 char *f, *fStop, *percentPtr, *p, *fmtBuffPtr, *buffPtr;
414 int op, performedOp, sizeModifier, buffCount = 0, buffLen, specifierLength;
415 int fastPath, n, auxBuffLen = 0, buffReqd, minWidth, precision, exp;
416 char *auxBuffPtr = NULL;
418 char fmtBuff[FMT_BUFFLEN];
419 char buff[PRINTF_BUFFLEN];
424 unsigned unsignedArg;
425 unsigned long uLongArg;
426 unsigned short uShortArg;
427 char *charPtrArg = NULL;
432 double doubleArg = 0.0;
433 LONG_DOUBLE lDoubleArg = 0.0L;
437 fStop = f + strlen(f);
439 percentPtr = (char *)memchr(f, '%', fStop - f);
440 if(percentPtr == NULL) percentPtr = fStop;
441 if(percentPtr != f) {
442 if(FCGX_PutStr(f, percentPtr - f, stream) < 0)
444 streamCount += percentPtr - f;
446 if(f == fStop) break;
450 * The following loop always executes either once or twice.
455 * Fast path: Scan optimistically, hoping that no flags,
456 * minimum field width, or precision are specified.
457 * Use the preallocated buffer, which is large enough
458 * for all fast path cases. If the conversion specifier
459 * is really more complex, run the loop a second time
460 * using the slow path.
461 * Note that fast path execution of %s bypasses the buffer
462 * and %f is not attempted on the fast path due to
463 * its large buffering requirements.
465 op = *(percentPtr + 1);
471 op = *(percentPtr + 2);
472 fmtBuff[1] = (char) sizeModifier;
473 fmtBuff[2] = (char) op;
479 fmtBuff[1] = (char) op;
485 buffLen = PRINTF_BUFFLEN;
488 * Slow path: Scan the conversion specifier and construct
489 * a new format string, compute an upper bound on the
490 * amount of buffering that sprintf will require,
491 * and allocate a larger buffer if necessary.
494 fmtBuffPtr = &fmtBuff[1];
498 n = strspn(p, "-0+ #");
501 CopyAndAdvance(&fmtBuffPtr, &p, n);
503 * Scan minimum field width
505 n = strspn(p, "0123456789");
508 minWidth = va_arg(arg, int);
509 if(abs(minWidth) > 999999)
512 * The following use of strlen rather than the
513 * value returned from sprintf is because SUNOS4
514 * returns a char * instead of an int count.
516 sprintf(fmtBuffPtr, "%d", minWidth);
517 fmtBuffPtr += strlen(fmtBuffPtr);
523 minWidth = strtol(p, NULL, 10);
524 CopyAndAdvance(&fmtBuffPtr, &p, n);
532 CopyAndAdvance(&fmtBuffPtr, &p, 1);
533 n = strspn(p, "0123456789");
536 precision = va_arg(arg, int);
537 if(precision < 0) precision = 0;
538 if(precision > 999999)
541 * The following use of strlen rather than the
542 * value returned from sprintf is because SUNOS4
543 * returns a char * instead of an int count.
545 sprintf(fmtBuffPtr, "%d", precision);
546 fmtBuffPtr += strlen(fmtBuffPtr);
552 precision = strtol(p, NULL, 10);
553 CopyAndAdvance(&fmtBuffPtr, &p, n);
561 * Scan size modifier and conversion operation
568 CopyAndAdvance(&fmtBuffPtr, &p, 1);
575 CopyAndAdvance(&fmtBuffPtr, &p, 1);
576 ASSERT(fmtBuffPtr - fmtBuff < FMT_BUFFLEN);
578 specifierLength = p - percentPtr;
580 * Bound the required buffer size. For s and f
581 * conversions this requires examining the argument.
592 buffReqd = max(precision, 46);
595 charPtrArg = va_arg(arg, char *);
596 if (!charPtrArg) charPtrArg = "(null)";
597 if(precision == -1) {
598 buffReqd = strlen(charPtrArg);
600 p = (char *)memchr(charPtrArg, '\0', precision);
602 (p == NULL) ? precision : p - charPtrArg;
606 switch(sizeModifier) {
608 doubleArg = va_arg(arg, double);
609 frexp(doubleArg, &exp);
612 lDoubleArg = va_arg(arg, LONG_DOUBLE);
613 /* XXX Need to check for the presence of
614 * frexpl() and use it if available */
615 frexp((double) lDoubleArg, &exp);
620 if(precision == -1) precision = 6;
621 buffReqd = precision + 3 + ((exp > 0) ? exp/3 : 0);
627 if(precision == -1) precision = 6;
628 buffReqd = precision + 8;
636 buffReqd = max(buffReqd + 10, minWidth);
638 * Allocate the buffer
640 if(buffReqd <= PRINTF_BUFFLEN) {
642 buffLen = PRINTF_BUFFLEN;
644 if(auxBuffPtr == NULL || buffReqd > auxBuffLen) {
645 if(auxBuffPtr != NULL) free(auxBuffPtr);
646 auxBuffPtr = (char *)Malloc(buffReqd);
647 auxBuffLen = buffReqd;
648 if(auxBuffPtr == NULL)
651 buffPtr = auxBuffPtr;
652 buffLen = auxBuffLen;
656 * This giant switch statement requires the following variables
657 * to be set up: op, sizeModifier, arg, buffPtr, fmtBuff.
658 * When fastPath == FALSE and op == 's' or 'f', the argument
659 * has been read into charPtrArg, doubleArg, or lDoubleArg.
660 * The statement produces the boolean performedOp, TRUE iff
661 * the op/sizeModifier were executed and argument consumed;
662 * if performedOp, the characters written into buffPtr[]
663 * and the character count buffCount (== EOF meaning error).
665 * The switch cases are arranged in the same order as in the
666 * description of fprintf in section 15.11 of Harbison and Steele.
672 switch(sizeModifier) {
674 intArg = va_arg(arg, int);
675 sprintf(buffPtr, fmtBuff, intArg);
676 buffCount = strlen(buffPtr);
679 longArg = va_arg(arg, long);
680 sprintf(buffPtr, fmtBuff, longArg);
681 buffCount = strlen(buffPtr);
684 shortArg = (short) va_arg(arg, int);
685 sprintf(buffPtr, fmtBuff, shortArg);
686 buffCount = strlen(buffPtr);
696 switch(sizeModifier) {
698 unsignedArg = va_arg(arg, unsigned);
699 sprintf(buffPtr, fmtBuff, unsignedArg);
700 buffCount = strlen(buffPtr);
703 uLongArg = va_arg(arg, unsigned long);
704 sprintf(buffPtr, fmtBuff, uLongArg);
705 buffCount = strlen(buffPtr);
708 uShortArg = (unsigned short) va_arg(arg, int);
709 sprintf(buffPtr, fmtBuff, uShortArg);
710 buffCount = strlen(buffPtr);
717 switch(sizeModifier) {
719 intArg = va_arg(arg, int);
720 sprintf(buffPtr, fmtBuff, intArg);
721 buffCount = strlen(buffPtr);
725 * XXX: Allowed by ISO C Amendment 1, but
726 * many platforms don't yet support wint_t
734 switch(sizeModifier) {
737 buffPtr = va_arg(arg, char *);
738 buffCount = strlen(buffPtr);
739 buffLen = buffCount + 1;
741 sprintf(buffPtr, fmtBuff, charPtrArg);
742 buffCount = strlen(buffPtr);
747 * XXX: Don't know how to convert a sequence
748 * of wide characters into a byte stream, or
749 * even how to predict the buffering required.
757 if(sizeModifier != ' ')
759 voidPtrArg = va_arg(arg, void *);
760 sprintf(buffPtr, fmtBuff, voidPtrArg);
761 buffCount = strlen(buffPtr);
764 switch(sizeModifier) {
766 intPtrArg = va_arg(arg, int *);
767 *intPtrArg = streamCount;
770 longPtrArg = va_arg(arg, long *);
771 *longPtrArg = streamCount;
774 shortPtrArg = (short *) va_arg(arg, short *);
775 *shortPtrArg = (short) streamCount;
787 switch(sizeModifier) {
789 sprintf(buffPtr, fmtBuff, doubleArg);
790 buffCount = strlen(buffPtr);
793 sprintf(buffPtr, fmtBuff, lDoubleArg);
794 buffCount = strlen(buffPtr);
804 switch(sizeModifier) {
806 doubleArg = va_arg(arg, double);
807 sprintf(buffPtr, fmtBuff, doubleArg);
808 buffCount = strlen(buffPtr);
811 lDoubleArg = va_arg(arg, LONG_DOUBLE);
812 sprintf(buffPtr, fmtBuff, lDoubleArg);
813 buffCount = strlen(buffPtr);
820 if(sizeModifier != ' ')
831 if(performedOp) break;
836 ASSERT(buffCount < buffLen);
838 if(FCGX_PutStr(buffPtr, buffCount, stream) < 0)
840 streamCount += buffCount;
841 } else if(buffCount < 0) {
844 f += specifierLength;
845 } /* while(f != fStop) */
850 if(auxBuffPtr != NULL) free(auxBuffPtr);
855 * Copy n characters from *srcPtr to *destPtr, then increment
856 * both *srcPtr and *destPtr by n.
858 static void CopyAndAdvance(char **destPtr, char **srcPtr, int n)
860 char *dest = *destPtr;
863 for (i = 0; i < n; i++)
870 *----------------------------------------------------------------------
874 * Flushes any buffered output.
876 * Server-push is a legitimate application of FCGX_FFlush.
877 * Otherwise, FCGX_FFlush is not very useful, since FCGX_Accept
878 * does it implicitly. FCGX_FFlush may reduce performance
879 * by increasing the total number of operating system calls
880 * the application makes.
883 * EOF (-1) if an error occurred.
885 *----------------------------------------------------------------------
887 int FCGX_FFlush(FCGX_Stream *stream)
889 if(stream->isClosed || stream->isReader)
891 stream->emptyBuffProc(stream, FALSE);
892 return (stream->isClosed) ? -1 : 0;
896 *----------------------------------------------------------------------
900 * Performs FCGX_FFlush and closes the stream.
902 * This is not a very useful operation, since FCGX_Accept
903 * does it implicitly. Closing the out stream before the
904 * err stream results in an extra write if there's nothing
905 * in the err stream, and therefore reduces performance.
908 * EOF (-1) if an error occurred.
910 *----------------------------------------------------------------------
912 int FCGX_FClose(FCGX_Stream *stream)
914 if (stream == NULL) return 0;
916 if(!stream->wasFCloseCalled) {
917 if(!stream->isReader) {
918 stream->emptyBuffProc(stream, TRUE);
920 stream->wasFCloseCalled = TRUE;
921 stream->isClosed = TRUE;
922 if(stream->isReader) {
923 stream->wrNext = stream->stop = stream->rdNext;
925 stream->rdNext = stream->stop = stream->wrNext;
928 return (stream->FCGI_errno == 0) ? 0 : EOF;
932 *----------------------------------------------------------------------
936 * An error has occurred; save the error code in the stream
937 * for diagnostic purposes and set the stream state so that
938 * reads return EOF and writes have no effect.
940 *----------------------------------------------------------------------
942 static void SetError(FCGX_Stream *stream, int FCGI_errno)
945 * Preserve only the first error.
947 if(stream->FCGI_errno == 0) {
948 stream->FCGI_errno = FCGI_errno;
949 stream->isClosed = TRUE;
954 *----------------------------------------------------------------------
958 * Return the stream error code. 0 means no error, > 0
959 * is an errno(2) error, < 0 is an FCGX_errno error.
961 *----------------------------------------------------------------------
963 int FCGX_GetError(FCGX_Stream *stream) {
964 return stream->FCGI_errno;
968 *----------------------------------------------------------------------
972 * Clear the stream error code and end-of-file indication.
974 *----------------------------------------------------------------------
976 void FCGX_ClearError(FCGX_Stream *stream) {
977 stream->FCGI_errno = 0;
979 * stream->isClosed = FALSE;
980 * XXX: should clear isClosed but work is needed to make it safe
981 * to do so. For example, if an application calls FClose, gets
982 * an I/O error on the write, calls ClearError and retries
983 * the FClose, FClose (really EmptyBuffProc) will write a second
984 * EOF record. If an application calls PutChar instead of FClose
985 * after the ClearError, the application will write more data.
986 * The stream's state must discriminate between various states
987 * of the stream that are now all lumped under isClosed.
992 *======================================================================
994 *======================================================================
998 * A vector of pointers representing the parameters received
999 * by a FastCGI application server, with the vector's length
1000 * and last valid element so adding new parameters is efficient.
1003 typedef struct Params {
1004 FCGX_ParamArray vec; /* vector of strings */
1005 int length; /* number of string vec can hold */
1006 char **cur; /* current item in vec; *cur == NULL */
1008 typedef Params *ParamsPtr;
1011 *----------------------------------------------------------------------
1015 * Creates a new Params structure.
1018 * Pointer to the new structure.
1020 *----------------------------------------------------------------------
1022 static ParamsPtr NewParams(int length)
1025 result = (Params *)Malloc(sizeof(Params));
1026 result->vec = (char **)Malloc(length * sizeof(char *));
1027 result->length = length;
1028 result->cur = result->vec;
1029 *result->cur = NULL;
1034 *----------------------------------------------------------------------
1038 * Frees a Params structure and all the parameters it contains.
1041 * env becomes invalid.
1043 *----------------------------------------------------------------------
1045 static void FreeParams(ParamsPtr *paramsPtrPtr)
1047 ParamsPtr paramsPtr = *paramsPtrPtr;
1049 if(paramsPtr == NULL) {
1052 for (p = paramsPtr->vec; p < paramsPtr->cur; p++) {
1055 free(paramsPtr->vec);
1057 *paramsPtrPtr = NULL;
1061 *----------------------------------------------------------------------
1065 * Add a name/value pair to a Params structure.
1071 * Parameters structure updated.
1073 *----------------------------------------------------------------------
1075 static void PutParam(ParamsPtr paramsPtr, char *nameValue)
1079 *paramsPtr->cur++ = nameValue;
1080 size = paramsPtr->cur - paramsPtr->vec;
1081 if(size >= paramsPtr->length) {
1082 paramsPtr->length *= 2;
1083 paramsPtr->vec = (FCGX_ParamArray)realloc(paramsPtr->vec, paramsPtr->length * sizeof(char *));
1084 paramsPtr->cur = paramsPtr->vec + size;
1086 *paramsPtr->cur = NULL;
1090 *----------------------------------------------------------------------
1092 * FCGX_GetParam -- obtain value of FCGI parameter in environment
1096 * Value bound to name, NULL if name not present in the
1097 * environment envp. Caller must not mutate the result
1098 * or retain it past the end of this request.
1100 *----------------------------------------------------------------------
1102 char *FCGX_GetParam(const char *name, FCGX_ParamArray envp)
1107 if (name == NULL || envp == NULL) return NULL;
1111 for (p = envp; *p; ++p) {
1112 if((strncmp(name, *p, len) == 0) && ((*p)[len] == '=')) {
1120 *----------------------------------------------------------------------
1122 * Start of FastCGI-specific code
1124 *----------------------------------------------------------------------
1128 *----------------------------------------------------------------------
1132 * Reads FastCGI name-value pairs from stream until EOF. Converts
1133 * each pair to name=value format and adds it to Params structure.
1135 *----------------------------------------------------------------------
1137 static int ReadParams(Params *paramsPtr, FCGX_Stream *stream)
1139 int nameLen, valueLen;
1140 unsigned char lenBuff[3];
1143 while((nameLen = FCGX_GetChar(stream)) != EOF) {
1145 * Read name length (one or four bytes) and value length
1146 * (one or four bytes) from stream.
1148 if((nameLen & 0x80) != 0) {
1149 if(FCGX_GetStr((char *) &lenBuff[0], 3, stream) != 3) {
1150 SetError(stream, FCGX_PARAMS_ERROR);
1153 nameLen = ((nameLen & 0x7f) << 24) + (lenBuff[0] << 16)
1154 + (lenBuff[1] << 8) + lenBuff[2];
1156 if((valueLen = FCGX_GetChar(stream)) == EOF) {
1157 SetError(stream, FCGX_PARAMS_ERROR);
1160 if((valueLen & 0x80) != 0) {
1161 if(FCGX_GetStr((char *) &lenBuff[0], 3, stream) != 3) {
1162 SetError(stream, FCGX_PARAMS_ERROR);
1165 valueLen = ((valueLen & 0x7f) << 24) + (lenBuff[0] << 16)
1166 + (lenBuff[1] << 8) + lenBuff[2];
1169 * nameLen and valueLen are now valid; read the name and value
1170 * from stream and construct a standard environment entry.
1172 nameValue = (char *)Malloc(nameLen + valueLen + 2);
1173 if(FCGX_GetStr(nameValue, nameLen, stream) != nameLen) {
1174 SetError(stream, FCGX_PARAMS_ERROR);
1178 *(nameValue + nameLen) = '=';
1179 if(FCGX_GetStr(nameValue + nameLen + 1, valueLen, stream)
1181 SetError(stream, FCGX_PARAMS_ERROR);
1185 *(nameValue + nameLen + valueLen + 1) = '\0';
1186 PutParam(paramsPtr, nameValue);
1192 *----------------------------------------------------------------------
1196 * Constructs an FCGI_Header struct.
1198 *----------------------------------------------------------------------
1200 static FCGI_Header MakeHeader(
1207 ASSERT(contentLength >= 0 && contentLength <= FCGI_MAX_LENGTH);
1208 ASSERT(paddingLength >= 0 && paddingLength <= 0xff);
1209 header.version = FCGI_VERSION_1;
1210 header.type = (unsigned char) type;
1211 header.requestIdB1 = (unsigned char) ((requestId >> 8) & 0xff);
1212 header.requestIdB0 = (unsigned char) ((requestId ) & 0xff);
1213 header.contentLengthB1 = (unsigned char) ((contentLength >> 8) & 0xff);
1214 header.contentLengthB0 = (unsigned char) ((contentLength ) & 0xff);
1215 header.paddingLength = (unsigned char) paddingLength;
1216 header.reserved = 0;
1221 *----------------------------------------------------------------------
1223 * MakeEndRequestBody --
1225 * Constructs an FCGI_EndRequestBody struct.
1227 *----------------------------------------------------------------------
1229 static FCGI_EndRequestBody MakeEndRequestBody(
1233 FCGI_EndRequestBody body;
1234 body.appStatusB3 = (unsigned char) ((appStatus >> 24) & 0xff);
1235 body.appStatusB2 = (unsigned char) ((appStatus >> 16) & 0xff);
1236 body.appStatusB1 = (unsigned char) ((appStatus >> 8) & 0xff);
1237 body.appStatusB0 = (unsigned char) ((appStatus ) & 0xff);
1238 body.protocolStatus = (unsigned char) protocolStatus;
1239 memset(body.reserved, 0, sizeof(body.reserved));
1244 *----------------------------------------------------------------------
1246 * MakeUnknownTypeBody --
1248 * Constructs an FCGI_MakeUnknownTypeBody struct.
1250 *----------------------------------------------------------------------
1252 static FCGI_UnknownTypeBody MakeUnknownTypeBody(
1255 FCGI_UnknownTypeBody body;
1256 body.type = (unsigned char) type;
1257 memset(body.reserved, 0, sizeof(body.reserved));
1262 *----------------------------------------------------------------------
1266 * Returns the smallest integer greater than or equal to n
1267 * that's a multiple of 8.
1269 *----------------------------------------------------------------------
1271 static int AlignInt8(unsigned n) {
1272 return (n + 7) & (UINT_MAX - 7);
1276 *----------------------------------------------------------------------
1280 * Returns the smallest pointer greater than or equal to p
1281 * that's a multiple of 8.
1283 *----------------------------------------------------------------------
1285 static unsigned char *AlignPtr8(unsigned char *p) {
1286 unsigned long u = (unsigned long) p;
1287 u = ((u + 7) & (ULONG_MAX - 7)) - u;
1293 * State associated with a stream
1295 typedef struct FCGX_Stream_Data {
1296 unsigned char *buff; /* buffer after alignment */
1297 int bufflen; /* number of bytes buff can store */
1298 unsigned char *mBuff; /* buffer as returned by Malloc */
1299 unsigned char *buffStop; /* reader: last valid byte + 1 of entire buffer.
1300 * stop generally differs from buffStop for
1301 * readers because of record structure.
1302 * writer: buff + bufflen */
1303 int type; /* reader: FCGI_PARAMS or FCGI_STDIN
1304 * writer: FCGI_STDOUT or FCGI_STDERR */
1305 int eorStop; /* reader: stop stream at end-of-record */
1306 int skip; /* reader: don't deliver content bytes */
1307 int contentLen; /* reader: bytes of unread content */
1308 int paddingLen; /* reader: bytes of unread padding */
1309 int isAnythingWritten; /* writer: data has been written to ipcFd */
1310 int rawWrite; /* writer: write data without stream headers */
1311 FCGX_Request *reqDataPtr; /* request data not specific to one stream */
1315 *----------------------------------------------------------------------
1317 * WriteCloseRecords --
1319 * Writes an EOF record for the stream content if necessary.
1320 * If this is the last writer to close, writes an FCGI_END_REQUEST
1323 *----------------------------------------------------------------------
1325 static void WriteCloseRecords(struct FCGX_Stream *stream)
1327 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1329 * Enter rawWrite mode so final records won't be encapsulated as
1332 data->rawWrite = TRUE;
1334 * Generate EOF for stream content if needed.
1336 if(!(data->type == FCGI_STDERR
1337 && stream->wrNext == data->buff
1338 && !data->isAnythingWritten)) {
1340 header = MakeHeader(data->type, data->reqDataPtr->requestId, 0, 0);
1341 FCGX_PutStr((char *) &header, sizeof(header), stream);
1344 * Generate FCGI_END_REQUEST record if needed.
1346 if(data->reqDataPtr->nWriters == 1) {
1347 FCGI_EndRequestRecord endRequestRecord;
1348 endRequestRecord.header = MakeHeader(FCGI_END_REQUEST,
1349 data->reqDataPtr->requestId,
1350 sizeof(endRequestRecord.body), 0);
1351 endRequestRecord.body = MakeEndRequestBody(
1352 data->reqDataPtr->appStatus, FCGI_REQUEST_COMPLETE);
1353 FCGX_PutStr((char *) &endRequestRecord,
1354 sizeof(endRequestRecord), stream);
1356 data->reqDataPtr->nWriters--;
1361 static int write_it_all(int fd, char *buf, int len)
1366 wrote = OS_Write(fd, buf, len);
1376 *----------------------------------------------------------------------
1380 * Encapsulates any buffered stream content in a FastCGI
1381 * record. Writes the data, making the buffer empty.
1383 *----------------------------------------------------------------------
1385 static void EmptyBuffProc(struct FCGX_Stream *stream, int doClose)
1387 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1390 * If the buffer contains stream data, fill in the header.
1391 * Pad the record to a multiple of 8 bytes in length. Padding
1392 * can't overflow the buffer because the buffer is a multiple
1393 * of 8 bytes in length. If the buffer contains no stream
1394 * data, reclaim the space reserved for the header.
1396 if(!data->rawWrite) {
1397 cLen = stream->wrNext - data->buff - sizeof(FCGI_Header);
1399 eLen = AlignInt8(cLen);
1401 * Giving the padding a well-defined value keeps Purify happy.
1403 memset(stream->wrNext, 0, eLen - cLen);
1404 stream->wrNext += eLen - cLen;
1405 *((FCGI_Header *) data->buff)
1406 = MakeHeader(data->type,
1407 data->reqDataPtr->requestId, cLen, eLen - cLen);
1409 stream->wrNext = data->buff;
1413 WriteCloseRecords(stream);
1415 if (stream->wrNext != data->buff) {
1416 data->isAnythingWritten = TRUE;
1417 if (write_it_all(data->reqDataPtr->ipcFd, (char *)data->buff, stream->wrNext - data->buff) < 0) {
1418 SetError(stream, OS_Errno);
1421 stream->wrNext = data->buff;
1424 * The buffer is empty.
1426 if(!data->rawWrite) {
1427 stream->wrNext += sizeof(FCGI_Header);
1432 * Return codes for Process* functions
1434 #define STREAM_RECORD 0
1436 #define BEGIN_RECORD 2
1437 #define MGMT_RECORD 3
1440 *----------------------------------------------------------------------
1442 * ProcessManagementRecord --
1444 * Reads and responds to a management record. The only type of
1445 * management record this library understands is FCGI_GET_VALUES.
1446 * The only variables that this library's FCGI_GET_VALUES
1447 * understands are FCGI_MAX_CONNS, FCGI_MAX_REQS, and FCGI_MPXS_CONNS.
1448 * Ignore other FCGI_GET_VALUES variables; respond to other
1449 * management records with a FCGI_UNKNOWN_TYPE record.
1451 *----------------------------------------------------------------------
1453 static int ProcessManagementRecord(int type, FCGX_Stream *stream)
1455 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1456 ParamsPtr paramsPtr = NewParams(3);
1458 char response[64]; /* 64 = 8 + 3*(1+1+14+1)* + padding */
1459 char *responseP = &response[FCGI_HEADER_LEN];
1460 char *name, value = '\0';
1462 if(type == FCGI_GET_VALUES) {
1463 ReadParams(paramsPtr, stream);
1464 if((FCGX_GetError(stream) != 0) || (data->contentLen != 0)) {
1465 FreeParams(¶msPtr);
1466 return FCGX_PROTOCOL_ERROR;
1468 for (pPtr = paramsPtr->vec; pPtr < paramsPtr->cur; pPtr++) {
1470 *(strchr(name, '=')) = '\0';
1471 if(strcmp(name, FCGI_MAX_CONNS) == 0) {
1473 } else if(strcmp(name, FCGI_MAX_REQS) == 0) {
1475 } else if(strcmp(name, FCGI_MPXS_CONNS) == 0) {
1482 sprintf(responseP, "%c%c%s%c", len, 1, name, value);
1483 responseP += len + 3;
1486 len = responseP - &response[FCGI_HEADER_LEN];
1487 paddedLen = AlignInt8(len);
1488 *((FCGI_Header *) response)
1489 = MakeHeader(FCGI_GET_VALUES_RESULT, FCGI_NULL_REQUEST_ID,
1490 len, paddedLen - len);
1491 FreeParams(¶msPtr);
1493 paddedLen = len = sizeof(FCGI_UnknownTypeBody);
1494 ((FCGI_UnknownTypeRecord *) response)->header
1495 = MakeHeader(FCGI_UNKNOWN_TYPE, FCGI_NULL_REQUEST_ID,
1497 ((FCGI_UnknownTypeRecord *) response)->body
1498 = MakeUnknownTypeBody(type);
1500 if (write_it_all(data->reqDataPtr->ipcFd, response, FCGI_HEADER_LEN + paddedLen) < 0) {
1501 SetError(stream, OS_Errno);
1509 *----------------------------------------------------------------------
1511 * ProcessBeginRecord --
1513 * Reads an FCGI_BEGIN_REQUEST record.
1516 * BEGIN_RECORD for normal return. FCGX_PROTOCOL_ERROR for
1517 * protocol error. SKIP for attempt to multiplex
1518 * connection. -1 for error from write (errno in stream).
1521 * In case of BEGIN_RECORD return, stores requestId, role,
1522 * keepConnection values, and sets isBeginProcessed = TRUE.
1524 *----------------------------------------------------------------------
1526 static int ProcessBeginRecord(int requestId, FCGX_Stream *stream)
1528 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1529 FCGI_BeginRequestBody body;
1530 if(requestId == 0 || data->contentLen != sizeof(body)) {
1531 return FCGX_PROTOCOL_ERROR;
1533 if(data->reqDataPtr->isBeginProcessed) {
1535 * The Web server is multiplexing the connection. This library
1536 * doesn't know how to handle multiplexing, so respond with
1537 * FCGI_END_REQUEST{protocolStatus = FCGI_CANT_MPX_CONN}
1539 FCGI_EndRequestRecord endRequestRecord;
1540 endRequestRecord.header = MakeHeader(FCGI_END_REQUEST,
1541 requestId, sizeof(endRequestRecord.body), 0);
1542 endRequestRecord.body
1543 = MakeEndRequestBody(0, FCGI_CANT_MPX_CONN);
1544 if (write_it_all(data->reqDataPtr->ipcFd, (char *)&endRequestRecord, sizeof(endRequestRecord)) < 0) {
1545 SetError(stream, OS_Errno);
1552 * Accept this new request. Read the record body.
1554 data->reqDataPtr->requestId = requestId;
1555 if(FCGX_GetStr((char *) &body, sizeof(body), stream)
1557 return FCGX_PROTOCOL_ERROR;
1559 data->reqDataPtr->keepConnection = (body.flags & FCGI_KEEP_CONN);
1560 data->reqDataPtr->role = (body.roleB1 << 8) + body.roleB0;
1561 data->reqDataPtr->isBeginProcessed = TRUE;
1562 return BEGIN_RECORD;
1566 *----------------------------------------------------------------------
1570 * Interprets FCGI_Header. Processes FCGI_BEGIN_REQUEST and
1571 * management records here; extracts information from stream
1572 * records (FCGI_PARAMS, FCGI_STDIN) into stream.
1575 * >= 0 for a normal return, < 0 for error
1578 * XXX: Many (more than there used to be).
1579 * If !stream->isRequestIdSet, ProcessHeader initializes
1580 * stream->requestId from header and sets stream->isRequestIdSet
1581 * to TRUE. ProcessHeader also sets stream->contentLen to header's
1582 * contentLength, and sets stream->paddingLen to the header's
1585 *----------------------------------------------------------------------
1587 static int ProcessHeader(FCGI_Header header, FCGX_Stream *stream)
1589 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1591 if(header.version != FCGI_VERSION_1) {
1592 return FCGX_UNSUPPORTED_VERSION;
1594 requestId = (header.requestIdB1 << 8)
1595 + header.requestIdB0;
1596 data->contentLen = (header.contentLengthB1 << 8)
1597 + header.contentLengthB0;
1598 data->paddingLen = header.paddingLength;
1599 if(header.type == FCGI_BEGIN_REQUEST) {
1600 return ProcessBeginRecord(requestId, stream);
1602 if(requestId == FCGI_NULL_REQUEST_ID) {
1603 return ProcessManagementRecord(header.type, stream);
1605 if(requestId != data->reqDataPtr->requestId) {
1608 if(header.type != data->type) {
1609 return FCGX_PROTOCOL_ERROR;
1611 return STREAM_RECORD;
1615 *----------------------------------------------------------------------
1619 * Reads bytes from the ipcFd, supplies bytes to a stream client.
1621 *----------------------------------------------------------------------
1623 static void FillBuffProc(FCGX_Stream *stream)
1625 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1632 * If data->buff is empty, do a read.
1634 if(stream->rdNext == data->buffStop) {
1635 count = OS_Read(data->reqDataPtr->ipcFd, (char *)data->buff,
1638 SetError(stream, (count == 0 ? FCGX_PROTOCOL_ERROR : OS_Errno));
1641 stream->rdNext = data->buff;
1642 data->buffStop = data->buff + count;
1645 * Now data->buff is not empty. If the current record contains
1646 * more content bytes, deliver all that are present in data->buff.
1648 if(data->contentLen > 0) {
1649 count = min(data->contentLen, data->buffStop - stream->rdNext);
1650 data->contentLen -= count;
1652 stream->wrNext = stream->stop = stream->rdNext + count;
1655 stream->rdNext += count;
1656 if(data->contentLen > 0) {
1664 * If the current record (whose content has been fully consumed by
1665 * the client) was padded, skip over the padding bytes.
1667 if(data->paddingLen > 0) {
1668 count = min(data->paddingLen, data->buffStop - stream->rdNext);
1669 data->paddingLen -= count;
1670 stream->rdNext += count;
1671 if(data->paddingLen > 0) {
1676 * All done with the current record, including the padding.
1677 * If we're in a recursive call from ProcessHeader, deliver EOF.
1680 stream->stop = stream->rdNext;
1681 stream->isClosed = TRUE;
1685 * Fill header with bytes from the input buffer.
1687 count = min((int)sizeof(header) - headerLen,
1688 data->buffStop - stream->rdNext);
1689 memcpy(((char *)(&header)) + headerLen, stream->rdNext, count);
1691 stream->rdNext += count;
1692 if(headerLen < sizeof(header)) {
1697 * Interpret header. eorStop prevents ProcessHeader from reading
1698 * past the end-of-record when using stream to read content.
1700 data->eorStop = TRUE;
1701 stream->stop = stream->rdNext;
1702 status = ProcessHeader(header, stream);
1703 data->eorStop = FALSE;
1704 stream->isClosed = FALSE;
1708 * If this stream record header marked the end of stream
1709 * data deliver EOF to the stream client, otherwise loop
1712 * XXX: If this is final stream and
1713 * stream->rdNext != data->buffStop, buffered
1714 * data is next request (server pipelining)?
1716 if(data->contentLen == 0) {
1717 stream->wrNext = stream->stop = stream->rdNext;
1718 stream->isClosed = TRUE;
1727 * If this header marked the beginning of a new
1728 * request, return role information to caller.
1736 SetError(stream, status);
1744 *----------------------------------------------------------------------
1748 * Creates a stream to read or write from an open ipcFd.
1749 * The stream performs reads/writes of up to bufflen bytes.
1751 *----------------------------------------------------------------------
1753 static FCGX_Stream *NewStream(
1754 FCGX_Request *reqDataPtr, int bufflen, int isReader, int streamType)
1757 * XXX: It would be a lot cleaner to have a NewStream that only
1758 * knows about the type FCGX_Stream, with all other
1759 * necessary data passed in. It appears that not just
1760 * data and the two procs are needed for initializing stream,
1761 * but also data->buff and data->buffStop. This has implications
1762 * for procs that want to swap buffers, too.
1764 FCGX_Stream *stream = (FCGX_Stream *)Malloc(sizeof(FCGX_Stream));
1765 FCGX_Stream_Data *data = (FCGX_Stream_Data *)Malloc(sizeof(FCGX_Stream_Data));
1766 data->reqDataPtr = reqDataPtr;
1767 bufflen = AlignInt8(min(max(bufflen, 32), FCGI_MAX_LENGTH + 1));
1768 data->bufflen = bufflen;
1769 data->mBuff = (unsigned char *)Malloc(bufflen);
1770 data->buff = AlignPtr8(data->mBuff);
1771 if(data->buff != data->mBuff) {
1775 data->buffStop = data->buff;
1777 data->buffStop = data->buff + data->bufflen;
1779 data->type = streamType;
1780 data->eorStop = FALSE;
1782 data->contentLen = 0;
1783 data->paddingLen = 0;
1784 data->isAnythingWritten = FALSE;
1785 data->rawWrite = FALSE;
1787 stream->data = data;
1788 stream->isReader = isReader;
1789 stream->isClosed = FALSE;
1790 stream->wasFCloseCalled = FALSE;
1791 stream->FCGI_errno = 0;
1793 stream->fillBuffProc = FillBuffProc;
1794 stream->emptyBuffProc = NULL;
1795 stream->rdNext = data->buff;
1796 stream->stop = stream->rdNext;
1797 stream->stopUnget = data->buff;
1798 stream->wrNext = stream->stop;
1800 stream->fillBuffProc = NULL;
1801 stream->emptyBuffProc = EmptyBuffProc;
1802 stream->wrNext = data->buff + sizeof(FCGI_Header);
1803 stream->stop = data->buffStop;
1804 stream->stopUnget = NULL;
1805 stream->rdNext = stream->stop;
1811 *----------------------------------------------------------------------
1813 * FCGX_FreeStream --
1815 * Frees all storage allocated when *streamPtr was created,
1816 * and nulls out *streamPtr.
1818 *----------------------------------------------------------------------
1820 void FCGX_FreeStream(FCGX_Stream **streamPtr)
1822 FCGX_Stream *stream = *streamPtr;
1823 FCGX_Stream_Data *data;
1824 if(stream == NULL) {
1827 data = (FCGX_Stream_Data *)stream->data;
1828 data->reqDataPtr = NULL;
1836 *----------------------------------------------------------------------
1840 * Re-initializes the stream to read data of the specified type.
1842 *----------------------------------------------------------------------
1844 static FCGX_Stream *SetReaderType(FCGX_Stream *stream, int streamType)
1846 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
1847 ASSERT(stream->isReader);
1848 data->type = streamType;
1849 data->eorStop = FALSE;
1851 data->contentLen = 0;
1852 data->paddingLen = 0;
1853 stream->wrNext = stream->stop = stream->rdNext;
1854 stream->isClosed = FALSE;
1859 *----------------------------------------------------------------------
1863 * Creates a stream to read streamType records for the given
1864 * request. The stream performs OS reads of up to bufflen bytes.
1866 *----------------------------------------------------------------------
1868 static FCGX_Stream *NewReader(FCGX_Request *reqDataPtr, int bufflen, int streamType)
1870 return NewStream(reqDataPtr, bufflen, TRUE, streamType);
1874 *----------------------------------------------------------------------
1878 * Creates a stream to write streamType FastCGI records, using
1879 * the ipcFd and RequestId contained in *reqDataPtr.
1880 * The stream performs OS writes of up to bufflen bytes.
1882 *----------------------------------------------------------------------
1884 static FCGX_Stream *NewWriter(FCGX_Request *reqDataPtr, int bufflen, int streamType)
1886 return NewStream(reqDataPtr, bufflen, FALSE, streamType);
1890 *----------------------------------------------------------------------
1892 * FCGX_CreateWriter --
1894 * Creates a stream to write streamType FastCGI records, using
1895 * the given ipcFd and request Id. This function is provided
1896 * for use by cgi-fcgi. In order to be defensive against misuse,
1897 * this function leaks a little storage; cgi-fcgi doesn't care.
1899 *----------------------------------------------------------------------
1901 FCGX_Stream *FCGX_CreateWriter(
1907 FCGX_Request *reqDataPtr = (FCGX_Request *)Malloc(sizeof(FCGX_Request));
1908 reqDataPtr->ipcFd = ipcFd;
1909 reqDataPtr->requestId = requestId;
1911 * Suppress writing an FCGI_END_REQUEST record.
1913 reqDataPtr->nWriters = 2;
1914 return NewWriter(reqDataPtr, bufflen, streamType);
1918 *======================================================================
1920 *======================================================================
1924 *----------------------------------------------------------------------
1928 * This routine determines if the process is running as a CGI or
1929 * FastCGI process. The distinction is made by determining whether
1930 * FCGI_LISTENSOCK_FILENO is a listener ipcFd or the end of a
1931 * pipe (ie. standard in).
1934 * TRUE if the process is a CGI process, FALSE if FastCGI.
1936 *----------------------------------------------------------------------
1938 int FCGX_IsCGI(void)
1940 if (isFastCGI != -1) {
1944 if (!libInitialized) {
1945 int rc = FCGX_Init();
1947 /* exit() isn't great, but hey */
1948 exit((rc < 0) ? rc : -rc);
1952 isFastCGI = OS_IsFcgi(FCGI_LISTENSOCK_FILENO);
1958 *----------------------------------------------------------------------
1962 * Finishes the current request from the HTTP server.
1966 * Finishes the request accepted by (and frees any
1967 * storage allocated by) the previous call to FCGX_Accept.
1969 * DO NOT retain pointers to the envp array or any strings
1970 * contained in it (e.g. to the result of calling FCGX_GetParam),
1971 * since these will be freed by the next call to FCGX_Finish
1974 *----------------------------------------------------------------------
1977 void FCGX_Finish(void)
1979 FCGX_Finish_r(&the_request);
1983 *----------------------------------------------------------------------
1987 * Finishes the current request from the HTTP server.
1991 * Finishes the request accepted by (and frees any
1992 * storage allocated by) the previous call to FCGX_Accept.
1994 * DO NOT retain pointers to the envp array or any strings
1995 * contained in it (e.g. to the result of calling FCGX_GetParam),
1996 * since these will be freed by the next call to FCGX_Finish
1999 *----------------------------------------------------------------------
2001 void FCGX_Finish_r(FCGX_Request *reqDataPtr)
2005 if (reqDataPtr == NULL) {
2009 close = !reqDataPtr->keepConnection;
2011 /* This should probably use a 'status' member instead of 'in' */
2012 if (reqDataPtr->in) {
2013 close |= FCGX_FClose(reqDataPtr->err);
2014 close |= FCGX_FClose(reqDataPtr->out);
2016 close |= FCGX_GetError(reqDataPtr->in);
2019 FCGX_Free(reqDataPtr, close);
2022 void FCGX_Free(FCGX_Request * request, int close)
2024 if (request == NULL)
2027 FCGX_FreeStream(&request->in);
2028 FCGX_FreeStream(&request->out);
2029 FCGX_FreeStream(&request->err);
2030 FreeParams(&request->paramsPtr);
2033 OS_IpcClose(request->ipcFd);
2034 request->ipcFd = -1;
2038 int FCGX_OpenSocket(const char *path, int backlog)
2040 int rc = OS_CreateLocalIpcFd(path, backlog);
2041 if (rc == FCGI_LISTENSOCK_FILENO && isFastCGI == 0) {
2042 /* XXX probably need to call OS_LibInit() again for Win */
2048 int FCGX_InitRequest(FCGX_Request *request, int sock, int flags)
2050 memset(request, 0, sizeof(FCGX_Request));
2052 /* @@@ Should check that sock is open and listening */
2053 request->listen_sock = sock;
2055 /* @@@ Should validate against "known" flags */
2056 request->flags = flags;
2058 request->ipcFd = -1;
2064 *----------------------------------------------------------------------
2068 * Initilize the FCGX library. This is called by FCGX_Accept()
2069 * but must be called by the user when using FCGX_Accept_r().
2072 * 0 for successful call.
2074 *----------------------------------------------------------------------
2080 if (libInitialized) {
2084 FCGX_InitRequest(&the_request, FCGI_LISTENSOCK_FILENO, 0);
2086 if (OS_LibInit(NULL) == -1) {
2087 return OS_Errno ? OS_Errno : -9997;
2090 p = getenv("FCGI_WEB_SERVER_ADDRS");
2091 webServerAddressList = p ? StringCopy(p) : NULL;
2098 *----------------------------------------------------------------------
2102 * Accepts a new request from the HTTP server.
2105 * 0 for successful call, -1 for error.
2109 * Finishes the request accepted by (and frees any
2110 * storage allocated by) the previous call to FCGX_Accept.
2111 * Creates input, output, and error streams and
2112 * assigns them to *in, *out, and *err respectively.
2113 * Creates a parameters data structure to be accessed
2114 * via getenv(3) (if assigned to environ) or by FCGX_GetParam
2115 * and assigns it to *envp.
2117 * DO NOT retain pointers to the envp array or any strings
2118 * contained in it (e.g. to the result of calling FCGX_GetParam),
2119 * since these will be freed by the next call to FCGX_Finish
2122 *----------------------------------------------------------------------
2129 FCGX_ParamArray *envp)
2133 if (! libInitialized) {
2140 rc = FCGX_Accept_r(&the_request);
2142 *in = the_request.in;
2143 *out = the_request.out;
2144 *err = the_request.err;
2145 *envp = the_request.envp;
2151 *----------------------------------------------------------------------
2155 * Accepts a new request from the HTTP server.
2158 * 0 for successful call, -1 for error.
2162 * Finishes the request accepted by (and frees any
2163 * storage allocated by) the previous call to FCGX_Accept.
2164 * Creates input, output, and error streams and
2165 * assigns them to *in, *out, and *err respectively.
2166 * Creates a parameters data structure to be accessed
2167 * via getenv(3) (if assigned to environ) or by FCGX_GetParam
2168 * and assigns it to *envp.
2170 * DO NOT retain pointers to the envp array or any strings
2171 * contained in it (e.g. to the result of calling FCGX_GetParam),
2172 * since these will be freed by the next call to FCGX_Finish
2175 *----------------------------------------------------------------------
2177 int FCGX_Accept_r(FCGX_Request *reqDataPtr)
2179 if (!libInitialized) {
2183 /* Finish the current request, if any. */
2184 FCGX_Finish_r(reqDataPtr);
2188 * If a connection isn't open, accept a new connection (blocking).
2189 * If an OS error occurs in accepting the connection,
2190 * return -1 to the caller, who should exit.
2192 if (reqDataPtr->ipcFd < 0) {
2193 int fail_on_intr = reqDataPtr->flags & FCGI_FAIL_ACCEPT_ON_INTR;
2195 reqDataPtr->ipcFd = OS_Accept(reqDataPtr->listen_sock, fail_on_intr, webServerAddressList);
2196 if (reqDataPtr->ipcFd < 0) {
2197 return (errno > 0) ? (0 - errno) : -9999;
2201 * A connection is open. Read from the connection in order to
2202 * get the request's role and environment. If protocol or other
2203 * errors occur, close the connection and try again.
2205 reqDataPtr->isBeginProcessed = FALSE;
2206 reqDataPtr->in = NewReader(reqDataPtr, 8192, 0);
2207 FillBuffProc(reqDataPtr->in);
2208 if(!reqDataPtr->isBeginProcessed) {
2213 switch(reqDataPtr->role) {
2214 case FCGI_RESPONDER:
2215 roleStr = "FCGI_ROLE=RESPONDER";
2217 case FCGI_AUTHORIZER:
2218 roleStr = "FCGI_ROLE=AUTHORIZER";
2221 roleStr = "FCGI_ROLE=FILTER";
2226 reqDataPtr->paramsPtr = NewParams(30);
2227 PutParam(reqDataPtr->paramsPtr, StringCopy(roleStr));
2229 SetReaderType(reqDataPtr->in, FCGI_PARAMS);
2230 if(ReadParams(reqDataPtr->paramsPtr, reqDataPtr->in) >= 0) {
2232 * Finished reading the environment. No errors occurred, so
2233 * leave the connection-retry loop.
2239 * Close the connection and try again.
2242 FCGX_Free(reqDataPtr, 1);
2246 * Build the remaining data structures representing the new
2247 * request and return successfully to the caller.
2249 SetReaderType(reqDataPtr->in, FCGI_STDIN);
2250 reqDataPtr->out = NewWriter(reqDataPtr, 8192, FCGI_STDOUT);
2251 reqDataPtr->err = NewWriter(reqDataPtr, 512, FCGI_STDERR);
2252 reqDataPtr->nWriters = 2;
2253 reqDataPtr->envp = reqDataPtr->paramsPtr->vec;
2258 *----------------------------------------------------------------------
2260 * FCGX_StartFilterData --
2262 * stream is an input stream for a FCGI_FILTER request.
2263 * stream is positioned at EOF on FCGI_STDIN.
2264 * Repositions stream to the start of FCGI_DATA.
2265 * If the preconditions are not met (e.g. FCGI_STDIN has not
2266 * been read to EOF) sets the stream error code to
2267 * FCGX_CALL_SEQ_ERROR.
2270 * 0 for a normal return, < 0 for error
2272 *----------------------------------------------------------------------
2275 int FCGX_StartFilterData(FCGX_Stream *stream)
2277 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
2278 if(data->reqDataPtr->role != FCGI_FILTER
2279 || !stream->isReader
2280 || !stream->isClosed
2281 || data->type != FCGI_STDIN) {
2282 SetError(stream, FCGX_CALL_SEQ_ERROR);
2285 SetReaderType(stream, FCGI_DATA);
2290 *----------------------------------------------------------------------
2292 * FCGX_SetExitStatus --
2294 * Sets the exit status for stream's request. The exit status
2295 * is the status code the request would have exited with, had
2296 * the request been run as a CGI program. You can call
2297 * SetExitStatus several times during a request; the last call
2298 * before the request ends determines the value.
2300 *----------------------------------------------------------------------
2303 void FCGX_SetExitStatus(int status, FCGX_Stream *stream)
2305 FCGX_Stream_Data *data = (FCGX_Stream_Data *)stream->data;
2306 data->reqDataPtr->appStatus = status;