尝试使用 C 访问 Twitter Streaming API [英] Trying to Access Twitter Streaming API with C

问题描述

我从 C libcurl 得到输出到一个字符串.我修改了它，我想用它来访问 Twitter Stream.我添加了 curl_easy_setopt(curl, CURLOPT_URL, "http://stream.twitter.com/1/statuses/sample.json"); 和 curl_easy_setopt(curl, CURLOPT_USERPWD, "neilmarion:my_password"); 在代码中.但问题是每当我执行它时，都没有输出.一定是什么问题?谢谢.

I got the code from C libcurl get output into a string. I modified it and I want to use it to access the Twitter Stream. I added curl_easy_setopt(curl, CURLOPT_URL, "http://stream.twitter.com/1/statuses/sample.json"); and curl_easy_setopt(curl, CURLOPT_USERPWD, "neilmarion:my_password"); in the code. But the problem is whenever I execute it, there is no output. What must be the problem? Thanks.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>

struct string {
  char *ptr;
  size_t len;
};

void init_string(struct string *s) {
  s->len = 0;
  s->ptr = malloc(s->len+1);
  if (s->ptr == NULL) {
    fprintf(stderr, "malloc() failed
");
    exit(EXIT_FAILURE);
  }
  s->ptr[0] = '';
}

size_t writefunc(void *ptr, size_t size, size_t nmemb, struct string *s)
{
  size_t new_len = s->len + size*nmemb;
  s->ptr = realloc(s->ptr, new_len+1);
  if (s->ptr == NULL) {
    fprintf(stderr, "realloc() failed
");
    exit(EXIT_FAILURE);
  }
  memcpy(s->ptr+s->len, ptr, size*nmemb);
  s->ptr[new_len] = '';
  s->len = new_len;

  return size*nmemb;
}

int main(void)
{
  CURL *curl;
  CURLcode res;

  curl = curl_easy_init();
  if(curl) {
    struct string s;
    init_string(&s);

    curl_easy_setopt(curl, CURLOPT_URL, "http://stream.twitter.com/1/statuses/sample.json");
    curl_easy_setopt(curl, CURLOPT_USERPWD, "neilmarion:my_password");
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writefunc);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
    res = curl_easy_perform(curl);

    printf("%s
", s.ptr);
    free(s.ptr);

    /* always cleanup */
    curl_easy_cleanup(curl);
  }
  return 0;
}

推荐答案

最快的下一步可能是设置 CURLOPT_HEADER，在正文输出中包含标题.最有可能的是，我猜它在安全性方面失败了，您会在标题中看到详细信息.

The quickest next step is probably to set CURLOPT_HEADER, to include headers in the body output. Most likely, I would guess it is failing on security, and you'll see the details in the headers.

这篇关于尝试使用 C 访问 Twitter Streaming API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！