The ProtoHandler, built on top of CivetHandler, transfer the proto file by http for frontend to parse message. 更多...

#include <proto_handler.h>

类 apollo::dreamview::ProtoHandler 继承关系图:

apollo::dreamview::ProtoHandler 的协作图:

Public 成员函数
	ProtoHandler ()

bool	handleGet (CivetServer server, struct mg_connection conn)

std::string	GenerateETag (const std::string &content)

详细描述

The ProtoHandler, built on top of CivetHandler, transfer the proto file by http for frontend to parse message.

在文件 proto_handler.h 第 42 行定义.

构造及析构函数说明

◆ ProtoHandler()

apollo::dreamview::ProtoHandler::ProtoHandler ( )

inline

在文件 proto_handler.h 第 44 行定义.

44{}

成员函数说明

◆ GenerateETag()

std::string apollo::dreamview::ProtoHandler::GenerateETag ( const std::string & content )

在文件 proto_handler.cc 第 118 行定义.

                                                             {
  // 使用 std::hash 生成基于内容的哈希值
  std::hash<std::string> hasher;
  size_t hash = hasher(content);
 
  // 将哈希值转换为十六进制字符串
  std::stringstream ss;
  ss << std::hex << hash;
 
  return ss.str();
}

◆ handleGet()

bool apollo::dreamview::ProtoHandler::handleGet	(	CivetServer *	server,
		struct mg_connection *	conn
	)

在文件 proto_handler.cc 第 27 行定义.

                                                                            {
  const struct mg_request_info *req_info = mg_get_request_info(conn);
 
  // parse request rui
  std::string request_uri = req_info->local_uri;
 
  // replace /proto to actual file root path prefix,remove /proto
  // todo(@lijin):adapt to package version,change this to a variable
  std::string file_relative_path = request_uri.substr(6);
  std::string mime_type = mg_get_builtin_mime_type(request_uri.c_str());
  std::string content, response_header;
 
  {
    std::lock_guard<std::mutex> lock(cache_mutex_);
    if (content_cache_.find(file_relative_path) != content_cache_.end()) {
      content = content_cache_[file_relative_path];
    }
  }
 
  if (content.empty()) {
    std::string file_abs_path;
    if (FindProtoPath(file_relative_path, &file_abs_path) &&
        apollo::cyber::common::GetContent(file_abs_path, &content)) {
      std::lock_guard<std::mutex> lock(cache_mutex_);
      content_cache_[file_relative_path] = content;
    } else {
      response_header = "HTTP/1.1 404 Not Found\r\nContent-Type: " + mime_type +
                        "\r\n\r\nFile not found";
      mg_printf(conn, response_header.c_str());
      return true;
    }
  }
 
  response_header = "HTTP/1.1 200 OK\r\nContent-Type: " + mime_type + "\r\n";
  mg_printf(conn, response_header.c_str());
  mg_printf(conn, "Cache-Control: max-age=86400\r\n\r\n");  // 缓存 24 小时
  // mg_printf(conn, "ETag: \"%s\"\r\n",
  //           GenerateETag(content).c_str());  // 生成并发送ETag
  mg_write(conn, content.data(), content.size());
 
  return true;
}

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