Curl libevent evhttp如何获取正文长度或任何正文数据？

使用下面的简单示例，我试图从如下生成的帖子正文中提取数据：

curl-v-X柱< 我得到的输出如下所述：

美元/每小时 len=0请求=

请帮忙

void process_request(struct evhttp_request *req, void *arg){ 
    struct evbuffer *buf;
    size_t len;
    char *data=malloc(1000);

    if (buf == NULL) return;

    buf=evhttp_request_get_input_buffer(req);

    len=evbuffer_copyout(buf, data, 1000);

    printf("len=%d req=%.*s\n", (int)len, (int)len, data);

    evbuffer_add_printf(buf, "Requested: %s\n", evhttp_request_uri(req));
    evhttp_send_reply(req, HTTP_OK, "OK", buf);
}

希望这将有助于：

void process_request(struct evhttp_request* req, void* arg){ 
    struct evbuffer* buf = null;
    size_t len = 0;
    char* data = null;

    if (req == NULL) return; // req is null after a timeout

    // get the event buffer containing POST body
    buf = evhttp_request_get_input_buffer(req);

    // get the length of POST body
    len = evbuffer_get_length(buf);

    // create a char array to extract POST body
    data = malloc(len + 1);
    data[len] = 0;

    // copy POST body into your char array
    evbuffer_copyout(buf, data, len);

    [...]

    // release memory
    free(data);
}               

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请添加一些描述/comments@prasun我改进了我的答案。希望它能帮助人们。