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034d0a2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | // Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include <cstdlib>
#include <mutex>
#include <string>
#include <fmt/format.h>
#include <httplib.h>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/web_result.h"
#include "web_service/web_backend.h"
namespace WebService {
constexpr std::array<const char, 1> API_VERSION{'1'};
constexpr std::size_t TIMEOUT_SECONDS = 30;
struct Client::Impl {
Impl(std::string host, std::string username, std::string token)
: host{std::move(host)}, username{std::move(username)}, token{std::move(token)} {
std::lock_guard lock{jwt_cache.mutex};
if (this->username == jwt_cache.username && this->token == jwt_cache.token) {
jwt = jwt_cache.jwt;
}
// normalize host expression
if (!this->host.empty() && this->host.back() == '/') {
static_cast<void>(this->host.pop_back());
}
}
/// A generic function handles POST, GET and DELETE request together
Common::WebResult GenericRequest(const std::string& method, const std::string& path,
const std::string& data, bool allow_anonymous,
const std::string& accept) {
if (jwt.empty()) {
UpdateJWT();
}
if (jwt.empty() && !allow_anonymous) {
LOG_ERROR(WebService, "Credentials must be provided for authenticated requests");
return Common::WebResult{Common::WebResult::Code::CredentialsMissing,
"Credentials needed"};
}
auto result = GenericRequest(method, path, data, accept, jwt);
if (result.result_string == "401") {
// Try again with new JWT
UpdateJWT();
result = GenericRequest(method, path, data, accept, jwt);
}
return result;
}
/**
* A generic function with explicit authentication method specified
* JWT is used if the jwt parameter is not empty
* username + token is used if jwt is empty but username and token are
* not empty anonymous if all of jwt, username and token are empty
*/
Common::WebResult GenericRequest(const std::string& method, const std::string& path,
const std::string& data, const std::string& accept,
const std::string& jwt = "", const std::string& username = "",
const std::string& token = "") {
if (cli == nullptr) {
cli = std::make_unique<httplib::Client>(host.c_str());
cli->set_connection_timeout(TIMEOUT_SECONDS);
cli->set_read_timeout(TIMEOUT_SECONDS);
cli->set_write_timeout(TIMEOUT_SECONDS);
}
if (!cli->is_valid()) {
LOG_ERROR(WebService, "Invalid URL {}", host + path);
return Common::WebResult{Common::WebResult::Code::InvalidURL, "Invalid URL"};
}
httplib::Headers params;
if (!jwt.empty()) {
params = {
{std::string("Authorization"), fmt::format("Bearer {}", jwt)},
};
} else if (!username.empty()) {
params = {
{std::string("x-username"), username},
{std::string("x-token"), token},
};
}
params.emplace(std::string("api-version"),
std::string(API_VERSION.begin(), API_VERSION.end()));
if (method != "GET") {
params.emplace(std::string("Content-Type"), std::string("application/json"));
};
httplib::Request request;
request.method = method;
request.path = path;
request.headers = params;
request.body = data;
httplib::Result result = cli->send(request);
if (!result) {
LOG_ERROR(WebService, "{} to {} returned null", method, host + path);
return Common::WebResult{Common::WebResult::Code::LibError, "Null response"};
}
httplib::Response response = result.value();
if (response.status >= 400) {
LOG_ERROR(WebService, "{} to {} returned error status code: {}", method, host + path,
response.status);
return Common::WebResult{Common::WebResult::Code::HttpError,
std::to_string(response.status)};
}
auto content_type = response.headers.find("content-type");
if (content_type == response.headers.end()) {
LOG_ERROR(WebService, "{} to {} returned no content", method, host + path);
return Common::WebResult{Common::WebResult::Code::WrongContent, ""};
}
if (content_type->second.find(accept) == std::string::npos) {
LOG_ERROR(WebService, "{} to {} returned wrong content: {}", method, host + path,
content_type->second);
return Common::WebResult{Common::WebResult::Code::WrongContent, "Wrong content"};
}
return Common::WebResult{Common::WebResult::Code::Success, "", response.body};
}
// Retrieve a new JWT from given username and token
void UpdateJWT() {
if (username.empty() || token.empty()) {
return;
}
auto result = GenericRequest("POST", "/jwt/internal", "", "text/html", "", username, token);
if (result.result_code != Common::WebResult::Code::Success) {
LOG_ERROR(WebService, "UpdateJWT failed");
} else {
std::lock_guard lock{jwt_cache.mutex};
jwt_cache.username = username;
jwt_cache.token = token;
jwt_cache.jwt = jwt = result.returned_data;
}
}
std::string host;
std::string username;
std::string token;
std::string jwt;
std::unique_ptr<httplib::Client> cli;
struct JWTCache {
std::mutex mutex;
std::string username;
std::string token;
std::string jwt;
};
static inline JWTCache jwt_cache;
};
Client::Client(std::string host, std::string username, std::string token)
: impl{std::make_unique<Impl>(std::move(host), std::move(username), std::move(token))} {}
Client::~Client() = default;
Common::WebResult Client::PostJson(const std::string& path, const std::string& data,
bool allow_anonymous) {
return impl->GenericRequest("POST", path, data, allow_anonymous, "application/json");
}
Common::WebResult Client::GetJson(const std::string& path, bool allow_anonymous) {
return impl->GenericRequest("GET", path, "", allow_anonymous, "application/json");
}
Common::WebResult Client::DeleteJson(const std::string& path, const std::string& data,
bool allow_anonymous) {
return impl->GenericRequest("DELETE", path, data, allow_anonymous, "application/json");
}
Common::WebResult Client::GetPlain(const std::string& path, bool allow_anonymous) {
return impl->GenericRequest("GET", path, "", allow_anonymous, "text/plain");
}
Common::WebResult Client::GetImage(const std::string& path, bool allow_anonymous) {
return impl->GenericRequest("GET", path, "", allow_anonymous, "image/png");
}
Common::WebResult Client::GetExternalJWT(const std::string& audience) {
return impl->GenericRequest("POST", fmt::format("/jwt/external/{}", audience), "", false,
"text/html");
}
} // namespace WebService
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