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diff --git a/tests/oauthdatapost.c b/tests/oauthdatapost.c
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+/**
+ *  @brief experimental code to sign data uploads
+ *  @file oauthimageupload.c
+ *  @author Robin Gareus <robin@gareus.org>
+ *
+ * Copyright 2008 Robin Gareus <robin@gareus.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <oauth.h>
+
+#ifdef USE_MMAP
+#include <sys/mman.h>
+#endif
+
+/** 
+ * example oauth body signature and HTTP-POST.
+ * WARNING: <b> This is request type is not part of the 
+ * oauth core 1.0</b>. 
+ *
+ * This is an experimental extension.
+ */
+int oauth_image_post(char *filename, char *url) {
+  const char *c_key         = "key"; //< consumer key
+  const char *c_secret      = "secret"; //< consumer secret
+  char *t_key               = NULL; //< access token key
+  char *t_secret            = NULL; //< access token secret
+
+  char *postarg = NULL;
+  char *req_url = NULL;
+  char *reply   = NULL;
+
+  char *filedata = NULL;
+  size_t filelen = 0;
+
+  FILE *F;
+
+  char *okey, *sign;
+  char *sig_url;
+
+  // get acces token - see oautexample.c
+  t_key    = strdup("key"); //< access token key
+  t_secret = strdup("secret"); //< access token secret
+
+  // read raw data to sign and send from file.
+  F= fopen(filename, "r");
+  if (!F) return 1;
+  fseek(F, 0L, SEEK_END);
+  filelen= ftell(F);
+  rewind(F);
+
+  #ifdef USE_MMAP
+  filedata=mmap(NULL,filelen,PROT_READ,MAP_SHARED,fileno(F),0L);
+  #else 
+  filedata=malloc(filelen*sizeof(char));
+  if (filelen != fread(filedata,sizeof(char), filelen, F)) {
+  	fclose(F);
+  	return 2;
+  }
+  fclose(F);
+  #endif
+
+  // sign the body
+  okey = oauth_catenc(2, c_secret, t_secret);
+  sign = oauth_sign_hmac_sha1_raw(filedata,filelen,okey,strlen(okey));
+  free(okey);
+  sig_url = malloc(63+strlen(url)+strlen(sign));
+  sprintf(sig_url,"%s&xoauth_body_signature=%s&xoauth_body_signature_method=HMAC_SHA1",url, sign);
+
+  // sign a POST request
+  req_url = oauth_sign_url2(sig_url, &postarg, OA_HMAC, NULL, c_key, c_secret, t_key, t_secret);
+  free(sig_url);
+
+  // append the oauth [post] parameters to the request-URL!!
+  sig_url = malloc(2+strlen(req_url)+strlen(postarg));
+  sprintf(sig_url,"%s?%s",req_url, postarg);
+
+  printf("POST:'%s'\n",sig_url);
+  //reply = oauth_post_file(sig_url,filename,filelen,"Content-Type: image/jpeg;");
+  printf("reply:'%s'\n",reply);
+
+  if(req_url) free(req_url);
+  if(postarg) free(postarg);
+  if(reply) free(reply);
+  if(t_key) free(t_key);
+  if(t_secret) free(t_secret);
+
+  #ifdef USE_MMAP
+  munmap(filedata,filelen);
+  fclose(F);
+  #else 
+  if(filedata) free(filedata);
+  #endif
+  return(0);
+}
+
+
+/**
+ * Main Test and Example Code.
+ * 
+ * compile:
+ *  gcc -lssl -loauth -o oauthdatapost oauthdatapost.c
+ */
+
+int main (int argc, char **argv) {
+  char *base_url = "http://mms06.test.mediamatic.nl";
+  char *filename = "/tmp/test.jpg";
+  int anyid = 18704;
+  char *title = "test";
+  char *url;
+
+  if (argc>4) base_url = argv[4];
+  if (argc>3) title = argv[3];
+  if (argc>2) anyid = atoi(argv[2]);
+  if (argc>1) filename = argv[1];
+
+  // TODO check if file exists; also read oauth-params from args or file
+
+  // anyMeta.nl image-post module URL
+  url = malloc(1024*sizeof(char));
+  if (anyid<1 && !title) 
+    sprintf(url,"%s/module/ImagePost/",base_url);
+  else if (anyid>0 && !title) 
+    sprintf(url,"%s/module/ImagePost/%i?echoid=1",base_url,anyid);
+  else if (anyid<1 && title) {
+    char *tp = oauth_url_escape(title);
+    sprintf(url,"%s/module/ImagePost/?title=%s",base_url,tp);
+    free(tp);
+  }
+  else if (anyid>0 && title) {
+    char *tp = oauth_url_escape(title);
+    sprintf(url,"%s/module/ImagePost/%i?echoid=1&title=%s",base_url,anyid,tp);
+    free(tp);
+  }
+
+  // doit
+  switch(oauth_image_post(filename, url)) {
+    case 0:
+      printf("request ok.\n");
+      break;
+    default:
+      printf("upload failed.\n");
+      break;
+  }
+  return(0);
+}