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Under GNU General Public License
2008-11-21 21:25 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
curl_formadd(3) libcurl Manual curl_formadd(3)
NAME
curl_formadd - add a section to a multipart/formdata HTTP POST
SYNOPSIS
#include <curl/curl.h>
CURLFORMcode curl_formadd(struct curl_httppost ** firstitem, struct curl_httppost
** lastitem, ...);
DESCRIPTION
curl_formadd() is used to append sections when building a multipart/formdata HTTP
POST (sometimes referred to as rfc1867-style posts). Append one section at a time
until you’ve added all the sections you want included and then you pass the
firstitem pointer as parameter to CURLOPT_HTTPPOST. lastitem is set after each
call and on repeated invokes it should be left as set to allow repeated invokes to
find the end of the list faster.
After the lastitem pointer follow the real arguments.
The pointers *firstitem and *lastitem should both be pointing to NULL in the first
call to this function. All list-data will be allocated by the function itself. You
must call curl_formfree after the form post has been done to free the resources
again.
Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue" header. You
can disable this header with CURLOPT_HTTPHEADER as usual.
First, there are some basics you need to understand about multipart/formdata posts.
Each part consists of at least a NAME and a CONTENTS part. If the part is made for
file upload, there are also a stored CONTENT-TYPE and a FILENAME. Below here, we’ll
discuss on what options you use to set these properties in the parts you want to
add to your post.
OPTIONS
CURLFORM_COPYNAME
followed by string is used to set the name of this part. libcurl copies the
given data, so your application doesn’t need to keep it around after this
function call. If the name isn’t zero terminated properly, or if you’d like
it to contain zero bytes, you need to set the length of the name with CURL-
FORM_NAMELENGTH.
CURLFORM_PTRNAME
followed by a string is used for the name of this part. libcurl will use the
pointer and refer to the data in your application, you must make sure it
remains until curl no longer needs it. If the name isn’t zero terminated
properly, or if you’d like it to contain zero bytes, you need to set the
length of the name with CURLFORM_NAMELENGTH.
CURLFORM_COPYCONTENTS
followed by a string is used for the contents of this part, the actual data
to send away. libcurl copies the given data, so your application doesn’t
need to keep it around after this function call. If the data isn’t zero ter-
minated properly, or if you’d like it to contain zero bytes, you need to set
the length of the name with CURLFORM_CONTENTSLENGTH.
CURLFORM_PTRCONTENTS
followed by a string is used for the contents of this part, the actual data
to send away. libcurl will use the pointer and refer to the data in your
application, you must make sure it remains until curl no longer needs it. If
the data isn’t zero terminated properly, or if you’d like it to contain zero
bytes, you need to set the length of the name with CURLFORM_CONTENTSLENGTH.
CURLFORM_CONTENTSLENGTH
followed by a long setting the length of the contents.
CURLFORM_FILECONTENT
followed by a file name, makes that file read and the contents will be used
in as data in this part.
CURLFORM_FILE
followed by a file name, makes this part a file upload part. It sets the
file name field to the actual file name used here, it gets the contents of
the file and passes as data and sets the content-type if the given file
match one of the new internally known file extension. For CURLFORM_FILE the
user may send one or more files in one part by providing multiple CURL-
FORM_FILE arguments each followed by the filename (and each CURLFORM_FILE is
allowed to have a CURLFORM_CONTENTTYPE).
CURLFORM_CONTENTTYPE
followed by a pointer to a string with a content-type will make curl use
this given content-type for this file upload part, possibly instead of an
internally chosen one.
CURLFORM_FILENAME
followed by a pointer to a string to a name, will make libcurl use the given
name in the file upload part, instead of the actual file name given to CURL-
FORM_FILE.
BCURLFORM_BUFFER
followed by a string, tells libcurl that a buffer is to be used to upload
data instead of using a file. The given string is used as the value of the
file name field in the content header.
CURLFORM_BUFFERPTR
followed by a pointer to a data area, tells libcurl the address of the
buffer containing data to upload (as indicated with CURLFORM_BUFFER). The
buffer containing this data must not be freed until after
curl_easy_cleanup(3) is called. You must also use CURLFORM_BUFFERLENGTH to
set the length of the given buffer area.
CURLFORM_BUFFERLENGTH
followed by a long with the size of the CURLFORM_BUFFERPTR data area, tells
libcurl the length of the buffer to upload.
CURLFORM_ARRAY
Another possibility to send options to curl_formadd() is the CURLFORM_ARRAY
option, that passes a struct curl_forms array pointer as its value. Each
curl_forms structure element has a CURLformoption and a char pointer. The
final element in the array must be a CURLFORM_END. All available options can
be used in an array, except the CURLFORM_ARRAY option itself! The last
argument in such an array must always be CURLFORM_END.
CURLFORM_CONTENTHEADER
specifies extra headers for the form POST section. This takes a curl_slist
prepared in the usual way using curl_slist_append and appends the list of
headers to those libcurl automatically generates. The list must exist while
the POST occurs, if you free it before the post completes you may experience
problems.
When you’ve passed the HttpPost pointer to curl_easy_setopt(3) (using the
CURLOPT_HTTPPOST option), you must not free the list until after you’ve
called curl_easy_cleanup(3) for the curl handle.
See example below.
RETURN VALUE
0 means everything was ok, non-zero means an error occurred as <curl/curl.h>
defines.
EXAMPLE
struct curl_httppost* post = NULL;
struct curl_httppost* last = NULL;
char namebuffer[] = "name buffer";
long namelength = strlen(namebuffer);
char buffer[] = "test buffer";
char htmlbuffer[] = "<HTML>test buffer</HTML>";
long htmlbufferlength = strlen(htmlbuffer);
struct curl_forms forms[3];
char file1[] = "my-face.jpg";
char file2[] = "your-face.jpg";
/* add null character into htmlbuffer, to demonstrate that
transfers of buffers containing null characters actually work
*/
htmlbuffer[8] = ’\0’;
/* Add simple name/content section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "name",
CURLFORM_COPYCONTENTS, "content", CURLFORM_END);
/* Add simple name/content/contenttype section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "htmlcode",
CURLFORM_COPYCONTENTS, "<HTML></HTML>",
CURLFORM_CONTENTTYPE, "text/html", CURLFORM_END);
/* Add name/ptrcontent section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "name_for_ptrcontent",
CURLFORM_PTRCONTENTS, buffer, CURLFORM_END);
/* Add ptrname/ptrcontent section */
curl_formadd(&post, &last, CURLFORM_PTRNAME, namebuffer,
CURLFORM_PTRCONTENTS, buffer, CURLFORM_NAMELENGTH,
namelength, CURLFORM_END);
/* Add name/ptrcontent/contenttype section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "html_code_with_hole",
CURLFORM_PTRCONTENTS, htmlbuffer,
CURLFORM_CONTENTSLENGTH, htmlbufferlength,
CURLFORM_CONTENTTYPE, "text/html", CURLFORM_END);
/* Add simple file section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "picture",
CURLFORM_FILE, "my-face.jpg", CURLFORM_END);
/* Add file/contenttype section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "picture",
CURLFORM_FILE, "my-face.jpg",
CURLFORM_CONTENTTYPE, "image/jpeg", CURLFORM_END);
/* Add two file section */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "pictures",
CURLFORM_FILE, "my-face.jpg",
CURLFORM_FILE, "your-face.jpg", CURLFORM_END);
/* Add two file section using CURLFORM_ARRAY */
forms[0].option = CURLFORM_FILE;
forms[0].value = file1;
forms[1].option = CURLFORM_FILE;
forms[1].value = file2;
forms[2].option = CURLFORM_END;
/* Add a buffer to upload */
curl_formadd(&post, &last,
CURLFORM_COPYNAME, "name",
CURLFORM_BUFFER, "data",
CURLFORM_BUFFERPTR, record,
CURLFORM_BUFFERLENGTH, record_length,
CURLFORM_END);
/* no option needed for the end marker */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "pictures",
CURLFORM_ARRAY, forms, CURLFORM_END);
/* Add the content of a file as a normal post text value */
curl_formadd(&post, &last, CURLFORM_COPYNAME, "filecontent",
CURLFORM_FILECONTENT, ".bashrc", CURLFORM_END);
/* Set the form info */
curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
SEE ALSO
curl_easy_setopt(3), curl_formfree(3)
libcurl 7.9.8 24 June 2002 curl_formadd(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-11-21 21:25 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)