mirror of
https://github.com/kidfromjupiter/nearby.git
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Timothy Hutchins
ea13cbc237
The `http_loader` class takes a `WebRequest` with information to send a web request, and sends it. This uses `libcurl`, which is present from installation on most major Linux distrobutions (e.g. Fedora, Ubuntu, PopOS...). If libcurl is not present on the target system, it will need to be installed.
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_LINUX_HTTP_LOADER_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_LINUX_HTTP_LOADER_H_
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#include <string>
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#include <curl/curl.h>
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#include "absl/status/status.h"
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#include "absl/status/statusor.h"
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#include "absl/strings/string_view.h"
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#include "internal/platform/implementation/http_loader.h"
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namespace nearby {
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namespace linux {
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// HttpLoader is used to get HTTP response from remote server.
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//
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// HttpLoader gets HTTP request information from caller, and calling Windows
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// WinInet APIs to get HTTP response. The platform handles HTTP/HTTPS sessions.
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class HttpLoader {
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public:
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explicit HttpLoader(const nearby::api::WebRequest& request);
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~HttpLoader();
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absl::StatusOr<nearby::api::WebResponse> GetResponse();
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const nearby::api::WebRequest& GetRequest();
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private:
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// Defines the buffer size. It is used to init a buffer for receiving HTTP
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// response. The unit is byte.
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static constexpr int kReceiveBufferSize = 8 * 1024;
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static size_t CurlReadCallback(char *buffer, size_t size, size_t nitems, void *userdata);
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absl::Status ConnectWebServer();
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absl::Status SendRequest();
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absl::StatusOr<nearby::api::WebResponse> ProcessResponse();
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void DisconnectWebServer();
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absl::StatusOr<int> QueryStatusCode(CURL *file_handle);
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absl::StatusOr<std::string> QueryStatusText(CURL *request_handle);
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absl::StatusOr<std::multimap<std::string, std::string>> QueryResponseHeaders(
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CURL *request_handle);
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absl::Status QueryResponseInfo(CURL *request_handle, CURLINFO info_level,
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void *info);
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absl::Status ParseUrl();
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// Converts HTTP status code to absl Status.
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//
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// @param status_code HTTP status code, such 200, 404 etc.
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// @param status_message short description of the status code.
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// @return converted absl status.
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absl::Status HTTPCodeToStatus(int status_code,
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absl::string_view status_message);
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nearby::api::WebRequest request_;
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std::string host_;
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std::string path_;
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std::string schema_;
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bool is_secure_ = false;
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int port_ = 80;
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FILE *header_data_;
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char *header_strings_;
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size_t header_sizeloc_;
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struct curl_slist *our_header_data_;
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FILE *response_data_;
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char *response_strings_;
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size_t response_sizeloc_;
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CURL *curl_;
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};
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} // namespace linux
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_LINUX_HTTP_LOADER_H_
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