add http client

src/Http/HttpDownloader.h

@@ -0,0 +1,46 @@
+/*
+ * HttpDownloader.h
+ *
+ *  Created on: 2017年5月5日
+ *      Author: xzl
+ */
+
+#ifndef SRC_HTTP_HTTPDOWNLOADER_H_
+#define SRC_HTTP_HTTPDOWNLOADER_H_
+
+#include "HttpClientImp.h"
+
+namespace ZL {
+namespace Http {
+
+class HttpDownloader: public HttpClientImp {
+public:
+	typedef std::shared_ptr<HttpDownloader> Ptr;
+	typedef std::function<void(int code,const char *errMsg,const char *filePath)> onDownloadResult;
+	HttpDownloader();
+	virtual ~HttpDownloader();
+	//开始下载文件,默认断点续传方式下载
+	void startDownload(const string &url,const string &filePath = "",bool bAppend = true);
+	void startDownload(const string &url,const onDownloadResult &cb){
+		setOnResult(cb);
+		startDownload(url);
+	}
+	void setOnResult(const onDownloadResult &cb){
+		_onResult = cb;
+	}
+private:
+	void onResponseHeader(const string &status,const HttpHeader &headers) override;
+	void onResponseBody(const char *buf,size_t size,size_t recvedSize,size_t totalSize) override;
+	void onResponseCompleted() override;
+	void onDisconnect(const SockException &ex) override;
+	void closeFile();
+
+	FILE *_saveFile = nullptr;
+	string _filePath;
+	onDownloadResult _onResult;
+};
+
+} /* namespace Http */
+} /* namespace ZL */
+
+#endif /* SRC_HTTP_HTTPDOWNLOADER_H_ */