.\" You can view this file with: .\" nroff -man [file] .\" $Id$ .\" .TH curl_formadd 3 "19 August 2001" "libcurl 7.9" "libcurl Manual" .SH NAME curl_formadd - add a section to a multipart/formdata HTTP POST .SH SYNOPSIS .B #include .sp .BI "CURLcode curl_formadd(struct HttpPost ** " firstitem, .BI "struct HttpPost ** " lastitem, " ...);" .ad .SH DESCRIPTION curl_formadd() is used to append sections when building a multipart/formdata HTTP POST (sometimes refered 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 \fIfirstitem\fP pointer as parameter to \fBCURLOPT_HTTPPOST\fP. \fIlastitem\fP 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 in a faster way. After \fIlastitem\fP follow the real arguments that constitute the new section (if the following description confuses you jump directly to the examples): The first is always CURLFORM_COPYNAME followed by a string used for the name of the section. Afterwards one may use one of three arguments: CURLFORM_COPYCONTENTS, CURLFORM_PTRCONTENTS, or CURLFORM_FILE. followed by a char or void pointer (allowed for PTRCONTENTS). The next argument may be CURLFORM_CONTENTTYPE if the user wishes to specify one (for FILE if no type is given the library tries to provide the correct one; for CONTENTS no Content-Type is sent in this case) For CURLFORM_PTRCONTENTS the user may also add CURLFORM_CONTENTSLENGTH followed by the length as a long (if not given the library will use strlen to determine the length; for COPYCONTENTS this is always done). For CURLFORM_FILE the user may send multiple files in one section by providing multiple CURLFORM_FILE arguments each followed by the filename (and each FILE is allowed to have a CONTENTTYPE). The last argument always is CURLFORM_END. The pointers \fI*firstitem\fP and \fI*lastitem\fP 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 \fIcurl_formfree\fP after the form post has been done to free the resources again. This function will copy all input data except the data pointed to by the argument after CURLFORM_PTRCONTENTS and keep its own version of it allocated until you call \fIcurl_formfree\fP. When you've passed the pointer to \fIcurl_easy_setopt\fP, you must not free the list until after you've called \fIcurl_easy_cleanup\fP for the curl handle. If you provide a pointer as an argument after CURLFORM_PTRCONTENTS you must ensure that the pointer stays valid until you call \fIcurl_form_free\fP and \fIcurl_easy_cleanup\fP. See example below. .SH RETURN VALUE Returns non-zero if an error occurs. .SH EXAMPLE .nf HttpPost* post = NULL; HttpPost* last = NULL; char buffer[] = "test buffer"; char htmlbuffer[] = "test buffer"; long htmlbufferlength = strlen(htmlbuffer); /* 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, "", CURLFORM_CONTENTTYPE, "text/html", CURLFORM_END); /* Add name/ptrcontent section */ curl_formadd(&post, &past, CURLFORM_COPYNAME, "name_for_ptrcontent", CURLFORM_PTRCONTENTS, buffer, 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); /* Set the form info */ curl_easy_setopt(curl, CURLOPT_HTTPPOST, post); .SH "SEE ALSO" .BR curl_easy_setopt "(3), " .BR curl_formparse "(3) [deprecated], " .BR curl_formfree "(3) .SH BUGS Surely there are some, you tell me!