使用適用於C ++的Google API客戶端庫的HTTP請求

Question

我正在嘗試使用Google API客戶端庫for C ++發送HTTP GET請求，使用http://google.github.io/google-api-cpp-client/latest/guide/making_http_requests.html中提到的用例示例。

這是我的計划：

#include "googleapis/client/data/data_reader.h"
#include "googleapis/client/transport/http_request.h"
#include "googleapis/client/transport/http_response.h"
#include "googleapis/client/transport/http_transport.h"
#include "googleapis/client/transport/curl_http_transport.h"
#include "googleapis/base/scoped_ptr.h"
#include "googleapis/base/mutex.h"
#include <curl/curl.h>
#include <glog/logging.h>
#include "googleapis/util/status.h"
#include <iostream>
#include <cstring>
#include <cstdlib>

using namespace googleapis;
using namespace std;

using googleapis::client::HttpRequest;
using googleapis::client::HttpRequestState;
using googleapis::client::HttpResponse;
using googleapis::client::HttpTransport;
using googleapis::client::HttpTransportLayerConf;
using googleapis::client::HttpTransportOptions;

void IllustrateGet(const char* url, HttpTransport* transport) {
    scoped_ptr<HttpRequest> request(
            transport->NewHttpRequest(HttpRequest::GET));
    request->set_url(url);
    util::Status status = request->Execute();
    if (!status.ok())
        cerr << status.error_message();
}


int main(){

    string url = "http://www.google.com/cloudprint";
    scoped_ptr<HttpTransport> transport;

    IllustrateGet(url, transport);
    return 0;

}

在main（）中，當我嘗試調用IllustrateGet函數時，我得到一個無效的參數異常。 有人可以幫我理解HttpTransport為了發送HTTP GET請求會做什么嗎？

Answer 1

調用IllustrateGet（url.c_str（），transport）;