mirror of
https://github.com/moparisthebest/curl
synced 2024-11-15 22:15:13 -05:00
618 lines
15 KiB
C
618 lines
15 KiB
C
/*****************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Curl.
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*
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* The Initial Developer of the Original Code is Daniel Stenberg.
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*
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* Portions created by the Initial Developer are Copyright (C) 1998.
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* All Rights Reserved.
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*
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* ------------------------------------------------------------
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* Main author:
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* - Daniel Stenberg <Daniel.Stenberg@haxx.nu>
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*
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* http://curl.haxx.nu
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*
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* $Source$
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* $Revision$
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* $Date$
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* $Author$
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* $State$
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* $Locker$
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*
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* ------------------------------------------------------------
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****************************************************************************/
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/*
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Debug the form generator stand-alone by compiling this source file with:
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gcc -DHAVE_CONFIG_H -I../ -g -D_FORM_DEBUG -o formdata -I../include formdata.c
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run the 'formdata' executable and make sure the output is ok!
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try './formdata "name=Daniel" "poo=noo" "foo=bar"' and similarly
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <time.h>
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#include "setup.h"
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#include <curl/curl.h>
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#include "formdata.h"
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/* Length of the random boundary string. The risk of this being used
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in binary data is very close to zero, 64^32 makes
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6277101735386680763835789423207666416102355444464034512896
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combinations... */
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#define BOUNDARY_LENGTH 32
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/* What kind of Content-Type to use on un-specified files with unrecognized
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extensions. */
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#define HTTPPOST_CONTENTTYPE_DEFAULT "text/plain"
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/* This is a silly duplicate of the function in main.c to enable this source
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to compile stand-alone for better debugging */
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static void GetStr(char **string,
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char *value)
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{
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if(*string)
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free(*string);
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*string = strdup(value);
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}
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/***************************************************************************
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*
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* FormParse()
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*
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* Reads a 'name=value' paramter and builds the appropriate linked list.
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*
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* Specify files to upload with 'name=@filename'. Supports specified
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* given Content-Type of the files. Such as ';type=<content-type>'.
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*
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* You may specify more than one file for a single name (field). Specify
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* multiple files by writing it like:
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*
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* 'name=@filename,filename2,filename3'
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*
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* If you want content-types specified for each too, write them like:
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*
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* 'name=@filename;type=image/gif,filename2,filename3'
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*
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***************************************************************************/
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int curl_FormParse(char *input,
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struct HttpPost **httppost,
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struct HttpPost **last_post)
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{
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return FormParse(input, httppost, last_post);
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}
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#define FORM_FILE_SEPARATOR ','
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#define FORM_TYPE_SEPARATOR ';'
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int FormParse(char *input,
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struct HttpPost **httppost,
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struct HttpPost **last_post)
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{
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/* nextarg MUST be a string in the format 'name=contents' and we'll
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build a linked list with the info */
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char name[256];
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char contents[1024]="";
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char major[128];
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char minor[128];
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long flags = 0;
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char *contp;
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char *type = NULL;
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char *prevtype = NULL;
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char *sep;
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char *sep2;
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struct HttpPost *post;
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struct HttpPost *subpost; /* a sub-node */
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unsigned int i;
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if(1 <= sscanf(input, "%255[^ =] = %1023[^\n]", name, contents)) {
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/* the input was using the correct format */
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contp = contents;
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if('@' == contp[0]) {
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/* we use the @-letter to indicate file name(s) */
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flags = HTTPPOST_FILENAME;
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contp++;
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post=NULL;
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do {
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/* since this was a file, it may have a content-type specifier
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at the end too */
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sep=strchr(contp, FORM_TYPE_SEPARATOR);
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sep2=strchr(contp, FORM_FILE_SEPARATOR);
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/* pick the closest */
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if(sep2 && (sep2 < sep)) {
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sep = sep2;
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/* no type was specified! */
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}
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if(sep) {
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/* if we got here on a comma, don't do much */
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if(FORM_FILE_SEPARATOR != *sep)
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type = strstr(sep+1, "type=");
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else
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type=NULL;
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*sep=0; /* terminate file name at separator */
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if(type) {
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type += strlen("type=");
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if(2 != sscanf(type, "%127[^/]/%127[^,\n]",
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major, minor)) {
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fprintf(stderr, "Illegally formatted content-type field!\n");
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return 2; /* illegal content-type syntax! */
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}
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/* now point beyond the content-type specifier */
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sep = type + strlen(major)+strlen(minor)+1;
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/* find the following comma */
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sep=strchr(sep, FORM_FILE_SEPARATOR);
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}
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}
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else {
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type=NULL;
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sep=strchr(contp, FORM_FILE_SEPARATOR);
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}
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if(sep) {
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/* the next file name starts here */
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*sep =0;
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sep++;
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}
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if(!type) {
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/*
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* No type was specified, we scan through a few well-known
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* extensions and pick the first we match!
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*/
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struct ContentType {
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char *extension;
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char *type;
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};
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static struct ContentType ctts[]={
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{".gif", "image/gif"},
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{".jpg", "image/jpeg"},
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{".jpeg", "image/jpeg"},
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{".txt", "text/plain"},
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{".html", "text/plain"}
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};
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if(prevtype)
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/* default to the previously set/used! */
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type = prevtype;
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else
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/* It seems RFC1867 defines no Content-Type to default to
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text/plain so we don't actually need to set this: */
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type = HTTPPOST_CONTENTTYPE_DEFAULT;
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for(i=0; i<sizeof(ctts)/sizeof(ctts[0]); i++) {
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if(strlen(contp) >= strlen(ctts[i].extension)) {
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if(strequal(contp +
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strlen(contp) - strlen(ctts[i].extension),
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ctts[i].extension)) {
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type = ctts[i].type;
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break;
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}
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}
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}
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/* we have a type by now */
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}
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if(NULL == post) {
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/* For the first file name, we allocate and initiate the main list
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node */
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post = (struct HttpPost *)malloc(sizeof(struct HttpPost));
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if(post) {
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memset(post, 0, sizeof(struct HttpPost));
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GetStr(&post->name, name); /* get the name */
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GetStr(&post->contents, contp); /* get the contents */
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post->flags = flags;
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if(type) {
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GetStr(&post->contenttype, type); /* get type */
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prevtype=post->contenttype; /* point to the allocated string! */
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}
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/* make the previous point to this */
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if(*last_post)
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(*last_post)->next = post;
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else
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(*httppost) = post;
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(*last_post) = post;
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}
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}
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else {
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/* we add a file name to the previously allocated node, known as
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'post' now */
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subpost =(struct HttpPost *)malloc(sizeof(struct HttpPost));
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if(subpost) {
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memset(subpost, 0, sizeof(struct HttpPost));
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GetStr(&subpost->name, name); /* get the name */
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GetStr(&subpost->contents, contp); /* get the contents */
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subpost->flags = flags;
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if(type) {
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GetStr(&subpost->contenttype, type); /* get type */
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prevtype=subpost->contenttype; /* point to the allocated string! */
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}
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/* now, point our 'more' to the original 'more' */
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subpost->more = post->more;
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/* then move the original 'more' to point to ourselves */
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post->more = subpost;
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}
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}
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contp = sep; /* move the contents pointer to after the separator */
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} while(sep && *sep); /* loop if there's another file name */
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}
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else {
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post = (struct HttpPost *)malloc(sizeof(struct HttpPost));
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if(post) {
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memset(post, 0, sizeof(struct HttpPost));
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GetStr(&post->name, name); /* get the name */
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GetStr(&post->contents, contp); /* get the contents */
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post->flags = 0;
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/* make the previous point to this */
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if(*last_post)
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(*last_post)->next = post;
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else
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(*httppost) = post;
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(*last_post) = post;
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}
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}
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}
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else {
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fprintf(stderr, "Illegally formatted input field!\n");
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return 1;
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}
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return 0;
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}
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static int AddFormData(struct FormData **formp,
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void *line,
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long length)
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{
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struct FormData *newform = (struct FormData *)
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malloc(sizeof(struct FormData));
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newform->next = NULL;
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/* we make it easier for plain strings: */
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if(!length)
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length = strlen((char *)line);
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newform->line = (char *)malloc(length+1);
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memcpy(newform->line, line, length+1);
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newform->length = length;
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if(*formp) {
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(*formp)->next = newform;
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*formp = newform;
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}
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else
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*formp = newform;
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return length;
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}
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static int AddFormDataf(struct FormData **formp,
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char *fmt, ...)
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{
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char s[1024];
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va_list ap;
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va_start(ap, fmt);
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vsprintf(s, fmt, ap);
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va_end(ap);
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return AddFormData(formp, s, 0);
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}
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char *MakeFormBoundary(void)
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{
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char *retstring;
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static int randomizer=0; /* this is just so that two boundaries within
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the same form won't be identical */
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int i;
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static char table64[]=
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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retstring = (char *)malloc(BOUNDARY_LENGTH);
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if(!retstring)
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return NULL; /* failed */
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srand(time(NULL)+randomizer++); /* seed */
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strcpy(retstring, "curl"); /* bonus commercials 8*) */
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for(i=4; i<(BOUNDARY_LENGTH-1); i++) {
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retstring[i] = table64[rand()%64];
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}
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retstring[BOUNDARY_LENGTH-1]=0; /* zero terminate */
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return retstring;
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}
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void FormFree(struct FormData *form)
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{
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struct FormData *next;
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do {
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next=form->next; /* the following form line */
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free(form->line); /* free the line */
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free(form); /* free the struct */
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} while(form=next); /* continue */
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}
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struct FormData *getFormData(struct HttpPost *post,
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int *sizep)
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{
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struct FormData *form = NULL;
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struct FormData *firstform;
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struct HttpPost *file;
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int size =0;
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char *boundary;
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char *fileboundary=NULL;
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if(!post)
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return NULL; /* no input => no output! */
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boundary = MakeFormBoundary();
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/* Make the first line of the output */
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AddFormDataf(&form,
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"Content-Type: multipart/form-data;"
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" boundary=%s\r\n",
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boundary);
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/* we DO NOT count that line since that'll be part of the header! */
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firstform = form;
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do {
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/* boundary */
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size += AddFormDataf(&form, "\r\n--%s\r\n", boundary);
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size += AddFormDataf(&form,
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"Content-Disposition: form-data; name=\"%s\"",
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post->name);
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if(post->more) {
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/* If used, this is a link to more file names, we must then do
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the magic to include several files with the same field name */
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fileboundary = MakeFormBoundary();
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size += AddFormDataf(&form,
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"\r\nContent-Type: multipart/mixed,"
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" boundary=%s\r\n",
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fileboundary);
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}
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file = post;
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do {
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if(post->more) {
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/* if multiple-file */
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size += AddFormDataf(&form,
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"\r\n--%s\r\nContent-Disposition: attachment; filename=\"%s\"",
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fileboundary, file->contents);
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}
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else if(post->flags & HTTPPOST_FILENAME) {
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size += AddFormDataf(&form,
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"; filename=\"%s\"",
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post->contents);
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}
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if(file->contenttype) {
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/* we have a specified type */
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size += AddFormDataf(&form,
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"\r\nContent-Type: %s",
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file->contenttype);
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}
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if(file->contenttype &&
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!strnequal("text/", file->contenttype, 5)) {
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/* this is not a text content, mention our binary encoding */
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size += AddFormDataf(&form,
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"\r\nContent-Transfer-Encoding: binary");
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}
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size += AddFormDataf(&form,
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"\r\n\r\n");
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if(post->flags & HTTPPOST_FILENAME) {
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/* we should include the contents from the specified file */
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FILE *fileread;
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char buffer[1024];
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int nread;
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fileread = strequal("-", file->contents)?stdin:
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/* binary read for win32 crap */
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fopen(file->contents, "rb");
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if(fileread) {
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while((nread = fread(buffer, 1, 1024, fileread))) {
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size += AddFormData(&form,
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buffer,
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nread);
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}
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if(fileread != stdin)
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fclose(fileread);
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}
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else {
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size += AddFormDataf(&form, "[File wasn't found by client]");
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}
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}
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else {
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/* include the contents we got */
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size += AddFormDataf(&form,
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post->contents);
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}
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} while((file = file->more)); /* for each specified file for this field */
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if(post->more) {
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/* this was a multiple-file inclusion, make a termination file
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boundary: */
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size += AddFormDataf(&form,
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"\r\n--%s--",
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fileboundary);
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free(fileboundary);
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}
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} while((post=post->next)); /* for each field */
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/* end-boundary for everything */
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size += AddFormDataf(&form,
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"\r\n--%s--\r\n",
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boundary);
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*sizep = size;
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free(boundary);
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return firstform;
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}
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int FormInit(struct Form *form, struct FormData *formdata )
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{
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form->data = formdata;
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form->sent = 0;
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if(!formdata)
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return 1; /* error */
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return 0;
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}
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/* fread() emulation */
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int FormReader(char *buffer,
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size_t size,
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size_t nitems,
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FILE *mydata)
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{
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struct Form *form;
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int wantedsize;
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int gotsize;
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form=(struct Form *)mydata;
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wantedsize = size * nitems;
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if(!form->data)
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return 0; /* nothing, error, empty */
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do {
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if( (form->data->length - form->sent ) > wantedsize ) {
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memcpy(buffer, form->data->line + form->sent, wantedsize);
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form->sent += wantedsize;
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return wantedsize;
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}
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memcpy(buffer,
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form->data->line + form->sent,
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gotsize = (form->data->length - form->sent) );
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form->sent = 0;
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form->data = form->data->next; /* advance */
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} while(!gotsize && form->data);
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/* If we got an empty line and we have more data, we proceed to the next
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line immediately to avoid returning zero before we've reached the end.
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This is the bug reported November 22 1999 on curl 6.3. (Daniel) */
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return gotsize;
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}
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#ifdef _FORM_DEBUG
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int main(int argc, char **argv)
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{
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#if 0
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char *testargs[]={
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"name1 = data in number one",
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"name2 = number two data",
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"test = @upload"
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};
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#endif
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int i;
|
|
char *nextarg;
|
|
struct HttpPost *httppost=NULL;
|
|
struct HttpPost *last_post=NULL;
|
|
struct HttpPost *post;
|
|
int size;
|
|
int nread;
|
|
char buffer[4096];
|
|
|
|
struct FormData *form;
|
|
struct Form formread;
|
|
|
|
for(i=1; i<argc; i++) {
|
|
|
|
if( FormParse( argv[i],
|
|
&httppost,
|
|
&last_post)) {
|
|
fprintf(stderr, "Illegally formatted input field: '%s'!\n",
|
|
argv[i]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
form=getFormData(httppost, &size);
|
|
|
|
FormInit(&formread, form);
|
|
|
|
while(nread = FormReader(buffer, 1, sizeof(buffer), (FILE *)&formread)) {
|
|
fwrite(buffer, nread, 1, stderr);
|
|
}
|
|
|
|
fprintf(stderr, "size: %d\n", size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|