添加下载文件http api范例

server/WebApi.cpp

@@ -181,19 +181,35 @@ static inline void addHttpListener(){
         if(api_debug){
             auto newInvoker = [invoker,parser,allArgs](const string &codeOut,
                                                        const HttpSession::KeyValue &headerOut,
-                                                       const string &contentOut){
+                                                       const HttpBody::Ptr &body){
                 stringstream ss;
                 for(auto &pr : allArgs ){
                     ss << pr.first << " : " << pr.second << "\r\n";
                 }
 
-                DebugL << "\r\n# request:\r\n" << parser.Method() << " " << parser.FullUrl() << "\r\n"
-                       << "# content:\r\n" << parser.Content() << "\r\n"
-                       << "# args:\r\n" << ss.str()
-                       << "# response:\r\n"
-                       << contentOut << "\r\n";
+                //body默认为空
+                int64_t size = 0;
+                if (body && body->remainSize()) {
+                    //有body，获取body大小
+                    size = body->remainSize();
+                }
 
-                invoker(codeOut,headerOut,contentOut);
+                if(size < 4 * 1024){
+                    string contentOut = body->readData(size)->toString();
+                    DebugL << "\r\n# request:\r\n" << parser.Method() << " " << parser.FullUrl() << "\r\n"
+                           << "# content:\r\n" << parser.Content() << "\r\n"
+                           << "# args:\r\n" << ss.str()
+                           << "# response:\r\n"
+                           << contentOut << "\r\n";
+                    invoker(codeOut,headerOut,contentOut);
+                } else{
+                    DebugL << "\r\n# request:\r\n" << parser.Method() << " " << parser.FullUrl() << "\r\n"
+                           << "# content:\r\n" << parser.Content() << "\r\n"
+                           << "# args:\r\n" << ss.str()
+                           << "# response size:"
+                           << size <<"\r\n";
+                    invoker(codeOut,headerOut,body);
+                }
             };
             ((HttpSession::HttpResponseInvoker &)invoker) = newInvoker;
         }
@@ -596,6 +612,18 @@ void installWebApi() {
     });
 #endif
 
+    //新增http api下载可执行程序文件接口
+    //测试url http://127.0.0.1/index/api/downloadBin
+    API_REGIST_INVOKER(api,downloadBin,{
+        CHECK_SECRET();
+        auto body = std::make_shared<HttpFileBody>(exePath());
+        if(!body->remainSize()){
+            invoker("404 Not Found", HttpSession::KeyValue(), "");
+            return;
+        }
+        invoker("200 OK", HttpSession::KeyValue(), body);
+    });
+
     ////////////以下是注册的Hook API////////////
     API_REGIST(hook,on_publish,{
         //开始推流事件

src/Http/HttpBody.cpp

@@ -58,12 +58,32 @@ Buffer::Ptr HttpStringBody::readData(uint32_t size) {
 }
 
 //////////////////////////////////////////////////////////////////
+HttpFileBody::HttpFileBody(const string &filePath){
+    std::shared_ptr<FILE> fp(fopen(filePath.data(), "rb"), [](FILE *fp) {
+        if(fp){
+            fclose(fp);
+        }
+    });
+    if(!fp){
+        init(fp,0,0);
+    }else{
+        init(fp,0,HttpMultiFormBody::fileSize(fp.get()));
+    }
+}
 
 HttpFileBody::HttpFileBody(const std::shared_ptr<FILE> &fp, uint64_t offset, uint64_t max_size) {
+    init(fp,offset,max_size);
+}
+
+void HttpFileBody::init(const std::shared_ptr<FILE> &fp,uint64_t offset,uint64_t max_size){
     _fp = fp;
     _max_size = max_size;
 #ifdef ENABLE_MMAP
     do {
+        if(!_fp){
+            //文件不存在
+            break;
+        }
         int fd = fileno(fp.get());
         if (fd < 0) {
             WarnL << "fileno failed:" << get_uv_errmsg(false);
@@ -79,7 +99,7 @@ HttpFileBody::HttpFileBody(const std::shared_ptr<FILE> &fp, uint64_t offset, uin
         });
     } while (false);
 #endif
-    if(!_map_addr && offset){
+    if(!_map_addr && offset && fp.get()){
         //未映射,那么fseek设置偏移量
         fseek(fp.get(), offset, SEEK_SET);
     }

src/Http/HttpBody.h

@@ -93,10 +93,13 @@ public:
      * @param max_size 最大读取字节数，未判断是否大于文件真实大小
      */
     HttpFileBody(const std::shared_ptr<FILE> &fp,uint64_t offset,uint64_t max_size);
+    HttpFileBody(const string &file_path);
     ~HttpFileBody(){};
 
     uint64_t remainSize() override ;
     Buffer::Ptr readData(uint32_t size) override;
+private:
+    void init(const std::shared_ptr<FILE> &fp,uint64_t offset,uint64_t max_size);
 private:
     std::shared_ptr<FILE> _fp;
     uint64_t _max_size;