[develop] add create_snapshot() interface #387
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright The Overlaybd Authors | ||
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| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
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| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
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| #include <photon/net/http/url.h> | ||
| #include <string_view> | ||
| #include "image_service.h" | ||
| #include "image_file.h" | ||
| #include "api_server.h" | ||
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| int ApiHandler::handle_request(photon::net::http::Request& req, | ||
| photon::net::http::Response& resp, | ||
| std::string_view) { | ||
| auto target = req.target(); // string view, format: /snapshot?dev_id=${devID}&config=${config} | ||
| std::string_view query(""); | ||
| auto pos = target.find('?'); | ||
| if (pos != std::string_view::npos) { | ||
| query = target.substr(pos + 1); | ||
| } | ||
| LOG_DEBUG("Snapshot query: `", query); // string view, format: dev_id=${devID}&config=${config} | ||
| parse_params(query); | ||
| auto dev_id = params["dev_id"]; | ||
| auto config_path = params["config"]; | ||
| LOG_DEBUG("dev_id: `, config: `", dev_id, config_path); | ||
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| int code; | ||
| std::string msg; | ||
| ImageFile* img_file = nullptr; | ||
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| if (dev_id.empty() || config_path.empty()) { | ||
| code = 400; | ||
| msg = std::string(R"delimiter({ | ||
| "success": false, | ||
| "message": "Missing dev_id or config in snapshot request" | ||
| })delimiter"); | ||
| goto EXIT; | ||
| } | ||
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| img_file = imgservice->find_image_file(dev_id); | ||
| if (!img_file) { | ||
| code = 404; | ||
| msg = std::string(R"delimiter({ | ||
| "success": false, | ||
| "message": "Image file not found" | ||
| })delimiter"); | ||
| goto EXIT; | ||
| } | ||
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| if (img_file->create_snapshot(config_path.c_str()) < 0) { | ||
| code = 500; | ||
| msg = std::string(R"delimiter({ | ||
| "success": false, | ||
| "message": "Failed to create snapshot`" | ||
| })delimiter"); | ||
| goto EXIT; | ||
| } | ||
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| code = 200; | ||
| msg = std::string(R"delimiter({ | ||
| "success": true, | ||
| "message": "Snapshot created successfully" | ||
| })delimiter"); | ||
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| EXIT: | ||
| resp.set_result(code); | ||
| resp.headers.content_length(msg.size()); | ||
| resp.keep_alive(true); | ||
| auto ret_w = resp.write((void*)msg.c_str(), msg.size()); | ||
| if (ret_w != (ssize_t)msg.size()) { | ||
| LOG_ERRNO_RETURN(0, -1, "send body failed, target: `, `", req.target(), VALUE(ret_w)); | ||
| } | ||
| LOG_DEBUG("send body done"); | ||
| return 0; | ||
| } | ||
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| void ApiHandler::parse_params(std::string_view query) { // format: dev_id=${devID}&config=${config}... | ||
| if (query.empty()) | ||
| return; | ||
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| size_t start = 0; | ||
| while (start < query.length()) { | ||
| auto end = query.find('&', start); | ||
| if (end == std::string_view::npos) { // last one | ||
| end = query.length(); | ||
| } | ||
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| auto param = query.substr(start, end - start); | ||
| auto eq_pos = param.find('='); | ||
| if (eq_pos != std::string_view::npos) { | ||
| auto key = param.substr(0, eq_pos); | ||
| auto value = param.substr(eq_pos + 1); | ||
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| // url decode | ||
| auto decoded_key = photon::net::http::url_unescape(key); | ||
| auto decoded_value = photon::net::http::url_unescape(value); | ||
| params[decoded_key] = decoded_value; | ||
| } else { | ||
| // key without value | ||
| auto key = photon::net::http::url_unescape(param); | ||
| params[key] = ""; | ||
| } | ||
| start = end + 1; | ||
| } | ||
| } | ||
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| ApiServer::ApiServer(const std::string &addr, ApiHandler* handler) { | ||
| photon::net::http::URL url(addr); | ||
| std::string host = url.host().data(); // the string pointed by data() doesn't end up with '\0' | ||
| auto pos = host.find(":"); | ||
| if (pos != host.npos) { | ||
| host.resize(pos); | ||
| } | ||
| tcpserver = photon::net::new_tcp_socket_server(); | ||
| tcpserver->setsockopt(SOL_SOCKET, SO_REUSEPORT, 1); | ||
| if(tcpserver->bind(url.port(), photon::net::IPAddr(host.c_str())) < 0) | ||
| LOG_ERRNO_RETURN(0, , "Failed to bind api server port `", url.port()); | ||
| if(tcpserver->listen() < 0) | ||
| LOG_ERRNO_RETURN(0, , "Failed to listen api server port `", url.port()); | ||
| httpserver = photon::net::http::new_http_server(); | ||
| httpserver->add_handler(handler, false, "/snapshot"); | ||
| tcpserver->set_handler(httpserver->get_connection_handler()); | ||
| tcpserver->start_loop(); | ||
| ready = true; | ||
| LOG_DEBUG("Api server listening on `:`, path: `", host, url.port(), "/snapshot"); | ||
| } | ||
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| ApiServer::~ApiServer() { | ||
| delete tcpserver; | ||
| delete httpserver; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| /* | ||
| Copyright The Overlaybd Authors | ||
|
|
||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
|
|
||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
|
||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
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| #pragma once | ||
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| #include <map> | ||
| #include <string> | ||
| #include <photon/net/http/server.h> | ||
| #include <photon/net/socket.h> | ||
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| class ImageService; | ||
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| class ApiHandler : public photon::net::http::HTTPHandler { | ||
| public: | ||
| ImageService *imgservice; | ||
| std::map<std::string, std::string> params; | ||
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| ApiHandler(ImageService *imgservice) : imgservice(imgservice) {} | ||
| int handle_request(photon::net::http::Request& req, | ||
| photon::net::http::Response& resp, | ||
| std::string_view) override; | ||
| void parse_params(std::string_view query); | ||
| }; | ||
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Contributor
There was a problem hiding this comment. I think it's not necessary to expose There was a problem hiding this comment. Are you suggesting that I should define ApiHandler in the cpp file instead of the header, and then instantiate it inside the ApiServer constructor?
Contributor
There was a problem hiding this comment.
Exactly. |
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| struct ApiServer { | ||
| photon::net::ISocketServer* tcpserver = nullptr; | ||
| photon::net::http::HTTPServer* httpserver = nullptr; | ||
| bool ready = false; | ||
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| ApiServer(const std::string &addr, ApiHandler* handler); | ||
| ~ApiServer(); | ||
| }; | ||
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Use
req.query()instead.