我想使用 C 编程将文件上传到 Google 云端硬盘。
我遵循了 Google's tutorial 的以下说明& libcurl example .
POST https://www.googleapis.com/upload/drive/v3/files?uploadType=media HTTP/1.1
Content-Type: image/jpeg
Content-Length: [NUMBER_OF_BYTES_IN_FILE]
Authorization: Bearer [YOUR_AUTH_TOKEN]
[JPEG_DATA]
但我不知道我应该用[JPEG_DATA]
替换什么。它是指文件名吗?
对于 Content-Length: [NUMBER_OF_BYTES_IN_FILE]
,这是否意味着我应该用我的计算机显示的准确文件大小替换它?
到目前为止我写的代码:
curl_handle = curl_easy_init();
struct curl_slist *header = NULL;
/* Content-Type: image/jpeg */
header = curl_slist_append(header, "Content-Type: image/jpeg");
不确定要在下面的 [NUMBER_OF_BYTES_IN_FILE]
中放入什么
/* Content-Length: [NUMBER_OF_BYTES_IN_FILE] */
header = curl_slist_append(header, "Content-Length:[NUMBER_OF_BYTES_IN_FILE]");
/* Authorization: Bearer [YOUR_AUTH_TOKEN] */
char auth[200];
strcat(auth, "Authorization: Bearer ");
strcat(auth, access_token);
header = curl_slist_append(header, auth);
curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, header);
/* POST https://www.googleapis.com/upload/drive/v3/files?uploadType=media HTTP/1.1 */
curl_easy_setopt(curl_handle, CURLOPT_URL, "https://www.googleapis.com/upload/drive/v3/files");
curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, "uploadType=media");
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
res = curl_easy_perform(curl_handle);
/* Print response */
if(res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res4));
}
else {
printf("%s\n", chunk.memory);
}
curl_easy_cleanup(curl_handle);
free(chunk.memory);
谢谢!
最佳答案
[JPEG_DATA]
将是文件的确切内容,一个字节接一个字节。 [NUMBER_OF_BYTES_IN_FILE]
是文件的大小,巧合的是 [JPEG_DATA]
中的字节数。
可以看到post-callback.c查看如何将负载添加到 POST 请求,以及 httpput.c查看如何从文件中增量读取数据。
关于c - 通过 HTTP 请求上传文件到 Google Drive (C),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55683419/