added a copy method to C::R::Upload and updated Cookbook

[catagits/Catalyst-Runtime.git] / lib / Catalyst / Manual / Cookbook.pod

diff --git a/lib/Catalyst/Manual/Cookbook.pod b/lib/Catalyst/Manual/Cookbook.pod
index 68d66d8..aa38da5 100644 (file)
--- a/lib/Catalyst/Manual/Cookbook.pod
+++ b/lib/Catalyst/Manual/Cookbook.pod
@@ -69,7 +69,7 @@ Just use Catalyst::Model::CDBI::CRUD as baseclass.
 Modify the $c->form() parameters to match your needs, and don't forget to copy
 the templates. ;)
 
-=head2 Uploads with Catalyst
+=head2 Single file upload with Catalyst
 
 To implement uploads in Catalyst you need to have a HTML form similiar to
 this:
@@ -85,28 +85,71 @@ if it's not there, uploads just don't work.
 
 Catalyst Controller module 'upload' action:
 
-        sub upload : Global {
-            my ($self, $c) = @_;
-            if ($c->req->parameters->{form_submit} eq 'yes') {
-                my $filename = $c->req->parameters->{my_file};
-                if ($filename) {
-                    my $fh = $c->req->uploads->{$filename}->{fh};
-                    open(NEW_FILE, ">/tmp/$filename") or die
-                        "Can't open file for writing: $!";
-                    while ($fh->read(my $buf, 32768)) {
-                        print NEW_FILE $buf;
-                    }
-                    close(NEW_FILE);
+    sub upload : Global {
+        my ($self, $c) = @_;
+
+        if ( $c->request->parameters->{form_submit} eq 'yes' ) {
+
+            if ( my $upload = $c->request->upload('my_file') ) {
+            
+                my $filename = $upload->filename;
+                my $target   = "/tmp/upload/$filename";
+                
+                unless ( $upload->link($target) || $upload->copy($target) ) {
+                    die( "Failed to copy '$filename' to '$target': $!" );
+                }
+            }
+        }
+        
+        $c->stash->{template} = 'file_upload.html';
+    }
+
+=head2 Multiple file upload with Catalyst
+
+Code for uploading multiple files from one form needs little changes compared
+to single file upload.
+
+Form goes like this:
+
+    <form action="/upload" method="post" enctype="multipart/form-data">
+      <input type="hidden" name="form_submit" value="yes">
+      <input type="file" name="file1" size="50"><br>
+      <input type="file" name="file2" size="50"><br>
+      <input type="file" name="file3" size="50"><br>
+      <input type="submit" value="Send">
+    </form>
+
+Controller:
+
+    sub upload : Local {
+        my ($self, $c) = @_;
+
+        if ( $c->request->parameters->{form_submit} eq 'yes' ) {
+
+            for my $field ( $c->req->upload ) {
+
+                my $filename = $upload->filename;
+                my $target   = "/tmp/upload/$filename";
+                
+                unless ( $upload->link($target) || $upload->copy($target) ) {
+                    die( "Failed to copy '$filename' to '$target': $!" );
                 }
             }
-            $c->stash->{template} = 'upload_form.tt';
-            $c->forward('MyApp::V::View');
         }
 
-If you want to upload bigger files than 1MB, then just add to your Controller 
-module:
+        $c->stash->{template} = 'file_upload.html';
+    }
+
+for my $field ($c->req->upload) loops automatically over all file input
+fields and gets input names. After that is basic file saving code, just like in
+single file upload.
+
+Notice: die'ing might not be what you want to do, when error occurs, but
+it works as an example. Better idea would be to store error $! in
+$c->stash->{error} and show custom error template displaying this message.
 
-    $CGI::Simple::POST_MAX = 1048576000;
+For more information about uploads and usable methods look at
+C<Catalyst::Request::Upload> and C<Catalyst::Request>.
 
 =head2 Authentication with Catalyst::Plugin::Authentication::CDBI