client-sdk-cpp/src/token_source.cpp at main · Soralsei/client-sdk-cpp · GitHub

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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

* 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.

#include "livekit/token_source.h"

#include <algorithm>

#include <cctype>

#include <exception>

#include <mutex>

#include <utility>

#include "token_source_internal.h"

namespace livekit {

namespace {

using TokenSourceResult = Result<TokenSourceResponse, TokenSourceError>;

using TokenSourceFuture = std::future<TokenSourceResult>;

constexpr const char* kDefaultSandboxBaseUrl = "https://cloud-api.livekit.io";

bool tokenRequestOptionsEqual(const TokenRequestOptions& a, const TokenRequestOptions& b) {

return a.room_name == b.room_name && a.participant_name == b.participant_name &&

a.participant_identity == b.participant_identity && a.participant_metadata == b.participant_metadata &&

a.participant_attributes == b.participant_attributes && a.agent_name == b.agent_name &&

a.agent_metadata == b.agent_metadata && a.agent_deployment == b.agent_deployment;

}

TokenSourceFuture makeFailedFuture(std::string message) {

std::promise<TokenSourceResult> promise;

promise.set_value(TokenSourceResult::failure(TokenSourceError{std::move(message)}));

return promise.get_future();

}

template <typename WorkFn>

TokenSourceFuture runAsyncTokenSource(std::string context, WorkFn&& work_fn) {

try {

return std::async(std::launch::async,

[context = std::move(context), work_fn = std::forward<WorkFn>(work_fn)]() mutable {

try {

return work_fn();

} catch (const std::exception& e) {

return TokenSourceResult::failure(TokenSourceError{context + ": " + std::string(e.what())});

} catch (...) {

return TokenSourceResult::failure(TokenSourceError{context + ": unknown exception"});

}

});

} catch (const std::exception& e) {

return makeFailedFuture(context + ": failed to start async work: " + std::string(e.what()));

} catch (...) {

return makeFailedFuture(context + ": failed to start async work: unknown exception");

}

std::string trimSandboxId(const std::string& sandbox_id) {

const auto is_space = [](unsigned char ch) { return std::isspace(ch) != 0; };

const auto begin = std::find_if_not(sandbox_id.begin(), sandbox_id.end(), is_space);

const auto end = std::find_if_not(sandbox_id.rbegin(), sandbox_id.rend(), is_space).base();

if (begin >= end) {

return {};

}

return std::string(begin, end);

}

std::string joinUrlPath(const std::string& base_url, const std::string& path) {

if (base_url.empty()) {

return path;

}

if (base_url.back() == '/') {

if (path.empty()) {

return base_url;

}

if (path.front() == '/') {

return base_url + path.substr(1);

}

return base_url + path;

}

if (path.empty()) {

return base_url;

}

if (path.front() == '/') {

return base_url + path;

}

return base_url + "/" + path;

}

struct ResolvedSandboxEndpoint {

std::string url;

TokenEndpointOptions options;

};

// Apply the sandbox header and resolve the connection-details URL shared by the

// production and test-only sandbox factories.

ResolvedSandboxEndpoint resolveSandboxEndpoint(const std::string& sandbox_id, TokenEndpointOptions options,

const std::string& base_url) {

options.headers["X-Sandbox-ID"] = trimSandboxId(sandbox_id);

const std::string resolved_base_url = base_url.empty() ? kDefaultSandboxBaseUrl : base_url;

return {joinUrlPath(resolved_base_url, "/api/v2/sandbox/connection-details"), std::move(options)};

}

} // namespace

std::unique_ptr<LiteralTokenSource> LiteralTokenSource::create(std::string server_url, std::string participant_token) {

TokenSourceResponse details;

details.server_url = std::move(server_url);

details.participant_token = std::move(participant_token);

return std::unique_ptr<LiteralTokenSource>(new LiteralTokenSource(std::move(details)));

}

std::unique_ptr<LiteralTokenSource> LiteralTokenSource::create(

std::function<std::future<Result<TokenSourceResponse, TokenSourceError>>()> provider) {

return std::unique_ptr<LiteralTokenSource>(new LiteralTokenSource(std::move(provider)));

}

LiteralTokenSource::LiteralTokenSource(TokenSourceResponse details) : details_(std::move(details)) {}

LiteralTokenSource::LiteralTokenSource(

std::function<std::future<Result<TokenSourceResponse, TokenSourceError>>()> provider)

: provider_(std::move(provider)) {}

std::future<Result<TokenSourceResponse, TokenSourceError>> LiteralTokenSource::fetch() {

if (provider_) {

return provider_();

}

return std::async(std::launch::deferred, [details = details_]() {

if (details.server_url.empty() || details.participant_token.empty()) {

return Result<TokenSourceResponse, TokenSourceError>::failure(

TokenSourceError{"literal token source returned empty server_url or participant_token"});

}

return Result<TokenSourceResponse, TokenSourceError>::success(details);

});

}

std::unique_ptr<CustomTokenSource> CustomTokenSource::create(

std::function<std::future<Result<TokenSourceResponse, TokenSourceError>>(const TokenRequestOptions&)> provider) {

return std::unique_ptr<CustomTokenSource>(new CustomTokenSource(std::move(provider)));

}

CustomTokenSource::CustomTokenSource(

std::function<std::future<Result<TokenSourceResponse, TokenSourceError>>(const TokenRequestOptions&)> provider)

: provider_(std::move(provider)) {}

std::future<Result<TokenSourceResponse, TokenSourceError>> CustomTokenSource::fetch(

const TokenRequestOptions& options) {

return provider_(options);

}

std::unique_ptr<EndpointTokenSource> EndpointTokenSource::create(std::string endpoint_url,

TokenEndpointOptions options) {

return std::unique_ptr<EndpointTokenSource>(

new EndpointTokenSource(std::move(endpoint_url), std::move(options), &tokenSourceHttpRequest));

}

EndpointTokenSource::EndpointTokenSource(std::string endpoint_url, TokenEndpointOptions options,

HttpTransport transport)

: endpoint_url_(std::move(endpoint_url)), options_(std::move(options)), transport_(std::move(transport)) {}

std::unique_ptr<EndpointTokenSource> EndpointTokenSourceTestAccess::create(std::string endpoint_url,

TokenEndpointOptions options,

TokenSourceHttpTransport transport) {

return std::unique_ptr<EndpointTokenSource>(

new EndpointTokenSource(std::move(endpoint_url), std::move(options), std::move(transport)));

}

std::future<Result<TokenSourceResponse, TokenSourceError>> EndpointTokenSource::fetch(

const TokenRequestOptions& options) {

std::shared_ptr<TokenRequestOptions> options_snapshot;

try {

options_snapshot = std::make_shared<TokenRequestOptions>(options);

} catch (const std::exception& e) {

return makeFailedFuture("token source endpoint fetch failed: failed to copy request options: " +

std::string(e.what()));

} catch (...) {

return makeFailedFuture("token source endpoint fetch failed: failed to copy request options: unknown exception");

}

return runAsyncTokenSource("token source endpoint fetch failed",

[this, options_snapshot]() { return fetchSync(*options_snapshot); });

}

Result<TokenSourceResponse, TokenSourceError> EndpointTokenSource::fetchSync(const TokenRequestOptions& options) const {

const std::string request_json = buildTokenSourceRequestJson(options);

auto headers = options_.headers;

auto http_result = transport_(options_.method, endpoint_url_, headers, request_json, options_.timeout);

if (!http_result) {

return Result<TokenSourceResponse, TokenSourceError>::failure(

TokenSourceError{"token server request failed: " + http_result.error()});

}

return parseTokenSourceResponseJson(http_result.value());

}

std::unique_ptr<SandboxTokenSource> SandboxTokenSource::create(const std::string& sandbox_id,

const SandboxTokenServerOptions& options) {

auto resolved = resolveSandboxEndpoint(sandbox_id, {}, options.base_url);

auto endpoint = EndpointTokenSource::create(std::move(resolved.url), std::move(resolved.options));

return std::unique_ptr<SandboxTokenSource>(new SandboxTokenSource(std::move(endpoint)));

}

SandboxTokenSource::SandboxTokenSource(std::unique_ptr<TokenSourceConfigurable> endpoint)

: endpoint_(std::move(endpoint)) {}

std::unique_ptr<SandboxTokenSource> SandboxTokenSourceTestAccess::create(const std::string& sandbox_id,

const SandboxTokenServerOptions& options,

TokenSourceHttpTransport transport) {

auto resolved = resolveSandboxEndpoint(sandbox_id, {}, options.base_url);

auto endpoint =

EndpointTokenSourceTestAccess::create(std::move(resolved.url), std::move(resolved.options), std::move(transport));

return std::unique_ptr<SandboxTokenSource>(new SandboxTokenSource(std::move(endpoint)));

}

std::future<Result<TokenSourceResponse, TokenSourceError>> SandboxTokenSource::fetch(

const TokenRequestOptions& options) {

return endpoint_->fetch(options);

}

std::unique_ptr<CachingTokenSource> CachingTokenSource::create(std::unique_ptr<TokenSourceConfigurable> inner) {

return std::unique_ptr<CachingTokenSource>(new CachingTokenSource(std::move(inner)));

}

CachingTokenSource::CachingTokenSource(std::unique_ptr<TokenSourceConfigurable> inner) : inner_(std::move(inner)) {}

std::future<Result<TokenSourceResponse, TokenSourceError>> CachingTokenSource::fetch(

const TokenRequestOptions& options) {

std::shared_ptr<TokenRequestOptions> options_snapshot;

try {

options_snapshot = std::make_shared<TokenRequestOptions>(options);

} catch (const std::exception& e) {

return makeFailedFuture("token source cache fetch failed: failed to copy request options: " +

std::string(e.what()));

} catch (...) {

return makeFailedFuture("token source cache fetch failed: failed to copy request options: unknown exception");

}

return runAsyncTokenSource("token source cache fetch failed", [this, options_snapshot]() {

const std::scoped_lock<std::mutex> lock(mutex_);

if (cached_details_.has_value() && cached_options_.has_value() &&

tokenRequestOptionsEqual(*cached_options_, *options_snapshot) &&

isParticipantTokenValid(cached_details_->participant_token)) {

return TokenSourceResult::success(*cached_details_);

}

auto result = inner_->fetch(*options_snapshot).get();

if (result) {

cached_options_ = *options_snapshot;

cached_details_ = result.value();

}

return result;

});

}

void CachingTokenSource::invalidate() {

const std::scoped_lock<std::mutex> lock(mutex_);

cached_options_.reset();

cached_details_.reset();

}

std::optional<TokenSourceResponse> CachingTokenSource::cachedResponse() const {

const std::scoped_lock<std::mutex> lock(mutex_);

return cached_details_;

}

} // namespace livekit

client-sdk-cpp/src/token_source.cpp at main · Soralsei/client-sdk-cpp · GitHub

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