基於curl C++簡單的get/post封裝

基於curl簡單的get/post封裝

#include <curl.h>
#include <memory>
static size_t string_write(char *ptr, size_t size, size_t nmemb, std::string &str)
{
    size_t total = size * nmemb;
    if (total) str.append(ptr, total);
    return total;
}
QString HttpCurlRequest(QString url, QString postData = "")
{
    char error[CURL_ERROR_SIZE];
    std::string writeData;
    auto curl_deleter = [](CURL* curl) {curl_easy_cleanup(curl);};
    using Curl = std::unique_ptr<CURL, decltype(curl_deleter)>;
    Curl curl{curl_easy_init(), curl_deleter};
    if (curl) {
        struct curl_slist *header = nullptr;
        header = curl_slist_append(header,"Content-Type: application/json");
        header = curl_slist_append(header,"Referer: https://xxx");
        header = curl_slist_append(header,"Cookie: uid=64665xxx");
        curl_easy_setopt(curl.get(), CURLOPT_URL, url.toStdString().c_str());
        curl_easy_setopt(curl.get(), CURLOPT_HTTPHEADER, header);
        curl_easy_setopt(curl.get(), CURLOPT_ERRORBUFFER, error);
        curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, string_write);
        curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA, &writeData);
        curl_easy_setopt(curl.get(), CURLOPT_COOKIEFILE,"");
        curl_easy_setopt(curl.get(), CURLOPT_SSL_ENABLE_ALPN, 0);   //support LIBCURL_VERSION_NUM >= 0x072400
        if(postData.length() > 0)
        {
            curl_easy_setopt(curl.get(), CURLOPT_POSTFIELDS, postData.toStdString().c_str());   //post
        }
        CURLcode code = curl_easy_perform(curl.get());
        curl_slist_free_all(header);
        return (code != CURLE_OK) ?  QString::fromUtf8(error) : QString::fromUtf8(writeData.c_str());
    }
}

調用：

    QString postUrl = "https://xxx.com/node/?d=lotxr";
    QString postData = "{\"axxd\":1327}";
    QString postRetStr = HttpCurlRequest(postUrl, postData);
    QDBG << postRetStr;

    QString getUrl = "https://xxx.com/node/?d=lxxer&c=tixx";
    QString getRetStr = HttpCurlRequest(getUrl);
    QDBG << getRetStr;