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爲了具有通用性,將文件的內容讀到了fc變量中,fclen是fc的長度。fc也可以是任何其它內容。curl 是 libcurl句柄。演示省略了很多顯而易見的步驟。1. 普通的post請求,這裏用curl_easy_escape對fc做了編碼std::string data("req=plain");data.append("&file=");char *efc = curl_easy_escape(curl, fc, fclen);data.append(efc)curl_free(encoded);curl_easy_setopt(curl, CURLOPT_URL, PURGE_URL);curl_easy_setopt(curl, CURLOPT_POST, 1L);curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data.c_str());curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, data.size());2. multipart/formdata請求struct curl_httppost *formpost = 0;struct curl_httppost *lastptr = 0;curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "reqformat", CURLFORM_PTRCONTENTS, "plain", CURLFORM_END);curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "file", CURLFORM_PTRCONTENTS, fc, CURLFORM_CONTENTSLENGTH, fclen, CURLFORM_END);curl_easy_setopt(curl, CURLOPT_URL, URL);curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);curl_easy_perform(curl);curl_formfree(formpost);3. multipart/formdata請求,不把文件讀入fc,其它步驟相同curl_formadd(&formpost, &lastptr, CURLFORM_PTRNAME, "file", CURLFORM_FILE, "/path/filename", CURLFORM_END);4. 通過put上傳文件curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);curl_easy_setopt(curl, CURLOPT_PUT, 1L);curl_easy_setopt(curl, CURLOPT_READDATA, fp); // FILE *fp = fopen("/path/filename");curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, fsize); // fsize = sizeof /path/filename5. 發送自己的Headerstruct curl_slist *slist = 0;slist = curl_slist_append(slist, "Blog-X-User: username");slist = curl_slist_append(slist, "Blog-X-Signature: signature");curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);curl_slist_free_all(slist);
使用libcurl POST數據和上傳文件
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