Cef发送HTTP请求(CefURLRequest)

• 通过调用CefURLRequest::Create()实现URL请求发送；
• 请求内容的接受、监控下载进度、下载完成等事件，通过继承虚类CefURLRequestClient来实现；

#include <include/cef_urlrequest.h>

// 请求处理类
class UrlRequestClient;  // public CefURLRequestClient

int main()
{
    // 填写请求头
    CefRequest::HeaderMap headers;
    headers.insert(std::make_pair("Accept", "*/*"));
    
    // 构建请求
    auto req = CefRequest::Create();
    req->SetMethod("GET");
    req->SetURL("http://localhost:8080/api/test");
    req->GetHeaderMap(headers);

    // 创建客户端代理请求
    auto client = CefRefPtr<UrlRequestClient>(new UrlRequestClient());
    CefURLRequest::Create(req, client, nullptr);
    
    return 0;
}

// 请求处理类 实现
class UrlRequestClient : public CefURLRequestClient
{
public:
    UrlRequestClient() = default;

    // 收到数据时
    void OnDownloadData(CefRefPtr<CefURLRequest> request,
        const void* data,
        size_t data_length) override
    {
        m_data += std::string(static_cast<const char*>(data), data_length);
    }

    bool GetAuthCredentials(bool isProxy,
        const CefString& host,
        int port,
        const CefString& realm,
        const CefString& scheme,
        CefRefPtr<CefAuthCallback> callback) override
    {
        return false;
    }

    // 实时显示下载进度
    void OnDownloadProgress(CefRefPtr<CefURLRequest> request,
        int64 current,
        int64 total) override {}
    
    // 实时显示上传进度
    void OnUploadProgress(CefRefPtr<CefURLRequest> request,
        int64 current,
        int64 total) override {}
    
    void OnRequestComplete(CefRefPtr<CefURLRequest> request) override
    {
        // 请求完成后，输出内容
        std::cout << m_data << std::endl;
    }

private:
    std::string m_data;

    IMPLEMENT_REFCOUNTING(UrlRequestClient);
};