Http

Overview
Installation
How to use
- Server
- Client
FAQ
License
Contributing

Overview

The library covers both sides of an HTTP exchange:

Server side (TinyBlocks\Http\Server) - decodes a PSR-7 ServerRequestInterface into typed accessors and builds outgoing ResponseInterface instances with cookies, cache-control, and status codes.
Client side (TinyBlocks\Http\Client) - composes outbound requests, sends them through a Transport port backed by any PSR-18 client, and exposes responses with typed body and header access.
Client resilience (TinyBlocks\Http\Client\Resilience) - decorates any PSR-18 client with retries, backoff policies, and notification of failed attempts, measuring each attempt with tiny-blocks/time.

Shared primitives at TinyBlocks\Http\: Method, Code, Headers, Headerable, ContentType, MimeType, Charset, Cookie, SameSite, CacheControl, ResponseCacheDirectives, Link, LinkRelation, UserAgent.

Installation

composer require tiny-blocks/http

How to use

Server

Decoding a request

Wrap a PSR-7 ServerRequestInterface and read typed fields from the body, route parameters, and query string.

<?php

declare(strict_types=1);

use Psr\Http\Message\ServerRequestInterface;
use TinyBlocks\Http\Server\Request;

/** @var ServerRequestInterface $psrRequest */
$decoded = Request::from(request: $psrRequest)->decode();

$id = $decoded->uri()->route()->get(key: 'id')->toInteger();
$sort = $decoded->uri()->queryParameters()->get(key: 'sort')->toString();
$name = $decoded->body()->get(key: 'name')->toString();
$amount = $decoded->body()->get(key: 'amount')->toFloat();

To pull several route parameters in one call, only(...) returns a map of typed Attribute instances keyed by name. A key with no matching route parameter resolves to an Attribute wrapping null rather than being omitted:

$attributes = $decoded->uri()->route()->only(keys: ['id', 'slug']);

$id = $attributes['id']->toInteger();
$slug = $attributes['slug']->toString();

The HTTP method is available as a typed Method enum:

<?php

declare(strict_types=1);

use Psr\Http\Message\ServerRequestInterface;
use TinyBlocks\Http\Server\Request;

/** @var ServerRequestInterface $psrRequest */
$method = Request::from(request: $psrRequest)->method();

Server\Request also exposes the headers, the query parameters, and the raw body directly, without decoding the payload. rawBody() returns the exact bytes received (handy for verifying a signature) and rewinds seekable streams, so a later decode() still observes the full body.

<?php

declare(strict_types=1);

use Psr\Http\Message\ServerRequestInterface;
use TinyBlocks\Http\Server\Request;

/** @var ServerRequestInterface $psrRequest */
$request = Request::from(request: $psrRequest);

$contentType = $request->headers()->get(name: 'content-type'); # case-insensitive lookup
$trace = $request->header(name: 'X-Trace-Id');                 # typed Attribute, or null
$sort = $request->query()->get(key: 'sort')->toString();
$rawBody = $request->rawBody();                                 # exact bytes, undecoded

Creating a response

Each helper returns a PSR-7 ResponseInterface and defaults to application/json:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Server\Response;

Response::ok(body: ['message' => 'Resource created successfully.']);
Response::created(body: ['id' => 42]);
Response::noContent();
Response::notFound(body: ['error' => 'Resource not found.']);

For custom status codes, use from(...):

<?php

declare(strict_types=1);

use TinyBlocks\Http\Code;
use TinyBlocks\Http\Server\Response;

Response::from(body: ['status' => 'accepted'], code: Code::ACCEPTED);

Attach additional headers via varargs of Headerable:

<?php

declare(strict_types=1);

use TinyBlocks\Http\CacheControl;
use TinyBlocks\Http\ContentType;
use TinyBlocks\Http\ResponseCacheDirectives;
use TinyBlocks\Http\Server\Response;

$cacheControl = CacheControl::fromResponseDirectives(
    ResponseCacheDirectives::maxAge(maxAgeInWholeSeconds: 10000)
);

Response::ok(['ok' => true], $cacheControl, ContentType::applicationJson())
    ->withHeader(name: 'X-Trace-Id', value: 'abc-123');

withStatus($code, $reasonPhrase) honors the supplied reason phrase: when a non-empty string is passed, getReasonPhrase() returns it instead of the enum-derived phrase.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Code;
use TinyBlocks\Http\Server\Response;

$response = Response::ok(body: null)->withStatus(Code::OK->value, 'All Good');
$response->getReasonPhrase(); # "All Good"

Pagination links

Link implements Headerable and renders an RFC 8288 Link response header. Chain to(...) and and(...) with LinkRelation targets to emit the standard pagination relations (first, prev, next, last, self), then attach it to any response.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Link;
use TinyBlocks\Http\LinkRelation;
use TinyBlocks\Http\Server\Response;

$links = Link::to(uri: 'https://api.example.com/items?page=1', relation: LinkRelation::FIRST)
    ->and(uri: 'https://api.example.com/items?page=4', relation: LinkRelation::PREVIOUS)
    ->and(uri: 'https://api.example.com/items?page=6', relation: LinkRelation::NEXT)
    ->and(uri: 'https://api.example.com/items?page=9', relation: LinkRelation::LAST);

Response::ok(['data' => []], $links);

The four targets fold into a single comma-separated Link response header in the order they were added.

Setting cookies

Cookie implements Headerable and composes naturally with Response.

withSameSite(SameSite::NONE) automatically enables the Secure flag. Browsers reject SameSite=None cookies that lack it. Calling secure() separately is not required.

withMaxAge(...) and withExpires(...) are mutually exclusive (last-write-wins): setting one clears the other. This follows RFC 6265 §4.1.2.2, which specifies that Max-Age takes precedence over Expires when both are present.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Cookie;
use TinyBlocks\Http\SameSite;
use TinyBlocks\Http\Server\Response;

$session = Cookie::create(name: 'session', value: $token)
    ->secure()
    ->httpOnly()
    ->withPath(path: '/v1/sessions')
    ->withMaxAge(seconds: 604800)
    ->withSameSite(sameSite: SameSite::STRICT);

Response::ok(['ok' => true], $session);

Setting SameSite=None without calling secure() first is safe. Secure is set automatically:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Cookie;
use TinyBlocks\Http\SameSite;
use TinyBlocks\Http\Server\Response;

# Secure is applied automatically when SameSite=None is set.
$crossSite = Cookie::create(name: 'session', value: $token)
    ->withSameSite(sameSite: SameSite::NONE);

Response::ok(['ok' => true], $crossSite);

To expire a cookie, use Cookie::expire(...) with the same Path and Domain used at creation. The expired cookie carries both Max-Age=0 and Expires set to the Unix epoch: modern browsers honor Max-Age. The Expires fallback covers legacy user agents.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Cookie;
use TinyBlocks\Http\SameSite;
use TinyBlocks\Http\Server\Response;

$expired = Cookie::expire(name: 'session')
    ->secure()
    ->httpOnly()
    ->withPath(path: '/v1/sessions')
    ->withSameSite(sameSite: SameSite::STRICT);

Response::noContent($expired);

Status code

The Code enum carries the full RFC HTTP status set with typed helpers:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Code;

Code::OK->value;                              # 200
Code::OK->message();                          # "OK"
Code::OK->isSuccess();                        # true
Code::CONTINUE->isInformational();            # true
Code::MOVED_PERMANENTLY->isRedirection();     # true
Code::BAD_REQUEST->isClientError();           # true
Code::INTERNAL_SERVER_ERROR->isError();       # true
Code::INTERNAL_SERVER_ERROR->isServerError(); # true
Code::GATEWAY_TIMEOUT->isTimeout();           # true

Code::isValidCode(code: 200);   # true
Code::isErrorCode(code: 500);   # true
Code::isSuccessCode(code: 200); # true

Code::tryFromNullable(code: 200);  # Code::OK
Code::tryFromNullable(code: 250);  # null (status code not represented)
Code::tryFromNullable(code: null); # null

Client

Building Http with a PSR-18 client and PSR-17 factories

Assemble the facade with any PSR-18 client and PSR-17 factories.

<?php

declare(strict_types=1);

use GuzzleHttp\Client;
use GuzzleHttp\Psr7\HttpFactory;
use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Http;

$factory = new HttpFactory();
$client = new Client(config: ['timeout' => 30, 'connect_timeout' => 5]);

$http = Http::create()
    ->withBaseUrl(url: 'https://api.example.com')
    ->withTransport(transport: NetworkTransport::with(client: $client, factory: $factory))
    ->build();

For a single-call construction without the fluent builder:

<?php

declare(strict_types=1);

use GuzzleHttp\Client;
use GuzzleHttp\Psr7\HttpFactory;
use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Http;

$client = new Client(config: ['timeout' => 30, 'connect_timeout' => 5]);
$factory = new HttpFactory();

$http = Http::with(
    baseUrl: 'https://api.example.com',
    transport: NetworkTransport::with(
        client: $client,
        factory: $factory
    )
);

Making a request

Six shortcut factories cover the most common HTTP methods. Supply only the arguments the request needs. The body, queryParameters, and headers all default to absent or empty.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\ContentType;
use TinyBlocks\Http\Headers;

$response = $http->send(request: Request::get(url: '/v1/charges/abc123'));

$response = $http->send(
    request: Request::post(
        url: '/v1/charges',
        body: ['amount' => 1000, 'currency' => 'usd'],
        headers: Headers::from(ContentType::applicationJson())
    )
);

$response = $http->send(request: Request::delete(url: '/v1/charges/abc123'));

For HTTP methods not covered by the six shortcuts (OPTIONS, TRACE, CONNECT, or any custom method), use Request::for(...), which accepts an explicit Method argument:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\Method;

$response = $http->send(
    request: Request::for(url: '/v1/charges', method: Method::OPTIONS)
);

Method also exposes RFC 9110 safety and idempotency predicates:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Method;

Method::GET->isSafe();        # true  (RFC 9110 §9.2.1)
Method::POST->isSafe();       # false
Method::PUT->isIdempotent();  # true  (RFC 9110 §9.2.2)
Method::POST->isIdempotent(); # false

Reading the response

<?php

declare(strict_types=1);

if ($response->isSuccess()) {
    $id = $response->body()->get(key: 'id')->toString();
    $amount = $response->body()->get(key: 'amount')->toInteger();
}

$response->raw();       # Psr\Http\Message\ResponseInterface
$response->code();      # Code enum
$response->headers();   # TinyBlocks\Http\Headers value object

Headers exposes case-insensitive lookup:

$contentType = $response->headers()->get(name: 'content-type'); # "application/json"
$hasTrace = $response->headers()->has(name: 'X-Trace-Id');      # true
$trace = $response->headers()->attribute(name: 'X-Trace-Id');   # Attribute, or null

orFail() returns the response unchanged on a 2xx status and throws HttpResponseUnsuccessful otherwise. The exception carries the Code and the decoded Body, so a non-2xx status can be branched on and its payload inspected in one place, then mapped to a domain error:

$body = $response->orFail()->body(); # throws HttpResponseUnsuccessful when the status is not 2xx

Query parameters

Pass query parameters via queryParameters:. The library encodes them in RFC 3986 form.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;

$response = $http->send(
    request: Request::get(
        url: '/v1/charges',
        queryParameters: ['status' => 'succeeded', 'limit' => 50]
    )
);

To replace query parameters on an existing request, use withQueryParameters(...):

$updated = $request->withQueryParameters(queryParameters: ['limit' => 100]);

Custom headers and content type

Compose any combination of Headerable via Headers::from(...):

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\ContentType;
use TinyBlocks\Http\Headerable;
use TinyBlocks\Http\Headers;

final readonly class IdempotencyKey implements Headerable
{
    public function __construct(private string $value)
    {
    }

    public function toArray(): array
    {
        return ['Idempotency-Key' => $this->value];
    }
}

$response = $http->send(
    request: Request::post(
        url: '/v1/charges',
        body: ['amount' => 1000],
        headers: Headers::from(
            ContentType::applicationJson(),
            new IdempotencyKey(value: $key)
        )
    )
);

Custom headers always win over the library's JSON defaults.

To add or replace a single header on an existing request, use withHeader(...). The lookup is case-insensitive: replacing Content-Type via content-type still finds and replaces the entry.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;

$updated = Request::get(url: '/v1/charges')
    ->withHeader(name: 'X-Trace-Id', value: 'abc-123');

ContentType renders its raw header value via toString(), useful when composing the header by hand:

ContentType::applicationJson(charset: Charset::UTF_8)->toString(); # "application/json; charset=utf-8"
ContentType::applicationJson(charset: Charset::UTF_8)->mimeType(); # MimeType::APPLICATION_JSON

Default headers

Carry headers applied to every request (for example a static authorization header) by passing defaultHeaders to the builder or to Http::with(...). Precedence per request is: a header set on the request wins over a default, and a default wins over the JSON defaults (Accept/Content-Type: application/json).

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Headers;
use TinyBlocks\Http\Http;

$defaultHeaders = Headers::fromArray(entries: ['Authorization' => 'Bearer token']);

$http = Http::create()
    ->withBaseUrl(url: 'https://api.example.com')
    ->withTransport(transport: NetworkTransport::with(client: $client, factory: $factory))
    ->withDefaultHeaders(headers: $defaultHeaders)
    ->build();

The same headers can be supplied through the single-call factory:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Headers;
use TinyBlocks\Http\Http;

$http = Http::with(
    baseUrl: 'https://api.example.com',
    transport: NetworkTransport::with(client: $client, factory: $factory),
    defaultHeaders: Headers::fromArray(entries: ['Authorization' => 'Bearer token'])
);

Setting the User-Agent

The UserAgent value object implements Headerable and renders the standard User-Agent header. An absent or empty version is normalized to "no version". The rendered header carries only the product token in that case.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\Headers;
use TinyBlocks\Http\UserAgent;

$userAgent = UserAgent::from(product: 'MyApp', version: '1.2.3');

$response = $http->send(
    request: Request::get(
        url: '/v1/charges',
        headers: Headers::from($userAgent)
    )
);

When the version is unknown:

<?php

declare(strict_types=1);

use TinyBlocks\Http\UserAgent;

$userAgent = UserAgent::from(product: 'MyApp');
# renders as: User-Agent: MyApp

UserAgent composes naturally with any other Headerable:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\ContentType;
use TinyBlocks\Http\Headers;
use TinyBlocks\Http\UserAgent;

$response = $http->send(
    request: Request::post(
        url: '/v1/charges',
        body: ['amount' => 1000],
        headers: Headers::from(
            UserAgent::from(product: 'MyApp', version: '1.2.3'),
            ContentType::applicationJson()
        )
    )
);

Error handling

Every failure raises an HttpException. TransportFailure (which extends HttpException) carries url(), method(), and reason(), and is implemented by every exception raised by the transport layer. The remaining HttpException implementations carry only the marker contract. Inspect their concrete class for the invariant they violated. Catch the specific class when you need to react to a particular failure mode. Order of catch branches matters because PHP matches the first applicable branch.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Exceptions\HttpException;
use TinyBlocks\Http\Exceptions\HttpRequestInvalid;
use TinyBlocks\Http\Exceptions\TransportFailure;

try {
    $http->send(request: $request);
} catch (HttpRequestInvalid $exception) {
    # PSR-18 RequestExceptionInterface: request malformed before transport.
    echo $exception->url();
    echo $exception->method()->name;
    echo $exception->reason();
} catch (TransportFailure $exception) {
    # Other transport failures (network errors, generic PSR-18 client failures).
    echo $exception->url();
    echo $exception->method()->name;
    echo $exception->reason();
} catch (HttpException $exception) {
    # Library-level failures (configuration, malformed path, exhausted in-memory transport).
    echo $exception::class;
}

Exception	Cause
`HttpRequestFailed`	Generic PSR-18 `ClientExceptionInterface`.
`HttpNetworkFailed`	PSR-18 `NetworkExceptionInterface` - DNS, timeout, connection refused.
`HttpRequestInvalid`	PSR-18 `RequestExceptionInterface` - request malformed before transport.
`MalformedPath`	Path attempts to escape the base URL (scheme, protocol-relative, control characters).
`NoMoreResponses`	`InMemoryTransport` exhausted (programmer error).
`HttpConfigurationInvalid`	Builder called without required dependencies.
`ClientNotConfigured`	`RetryingClientBuilder::build()` called without a PSR-18 client.
`SynthesizedResponseHasNoRaw`	`Response::raw()` called on a response created via `Response::with(...)`.
`HttpResponseUnsuccessful`	`Response::orFail()` called on a non-2xx response.

Retrying failed requests

RetryingClient is a PSR-18 decorator that retries transient failures. A network failure or a server error (HTTP 5xx) is retried until the attempt ceiling is reached, sleeping the configured backoff delay between attempts. A client error (HTTP 4xx) is never retried: the response is returned as is. Any other failure raised by the decorated client propagates immediately. When the attempts are exhausted, the last response is returned or the last exception is rethrown. The maxAttempts ceiling counts the first attempt, so maxAttempts: 2 means one retry.

Every failed attempt, the final one included, is reported to an optional RetryListener with the elapsed interval of the attempt (an Elapsed from tiny-blocks/time), its AttemptOutcome classification, the request, and the attempt number. Successful attempts are never reported.

`AttemptOutcome`	Trigger	Retried
`AttemptOutcome::TIMEOUT`	Network failure whose message mentions a timeout, or an HTTP 408 or 504 response.	Yes
`AttemptOutcome::CONNECTION_RESET`	Any other network failure.	Yes
`AttemptOutcome::SERVER_ERROR`	Any other HTTP 5xx response, non-RFC codes included.	Yes
`AttemptOutcome::CLIENT_ERROR`	Any other HTTP 4xx response.	No

Assemble the decorator with the fluent builder returned by RetryingClient::create(). Only the PSR-18 client is required, and build() raises ClientNotConfigured without one. Every other collaborator falls back to an opinionated default: an ExponentialBackoff with random jitter, an attempt ceiling of three, the system monotonic clock and sleeper, and a listener that ignores failures.

<?php

declare(strict_types=1);

use GuzzleHttp\Client;
use Psr\Http\Message\RequestInterface;
use Psr\Log\LoggerInterface;
use TinyBlocks\Http\Client\Resilience\AttemptOutcome;
use TinyBlocks\Http\Client\Resilience\FixedDelay;
use TinyBlocks\Http\Client\Resilience\RetryListener;
use TinyBlocks\Http\Client\Resilience\RetryingClient;
use TinyBlocks\Time\Elapsed;

final readonly class LoggingRetryListener implements RetryListener
{
    public function __construct(private LoggerInterface $logger)
    {
    }

    public function attemptFailed(
        Elapsed $elapsed,
        AttemptOutcome $outcome,
        RequestInterface $request,
        int $attemptNumber
    ): void {
        $this->logger->warning('http_attempt_failed', [
            'target'         => (string)$request->getUri(),
            'outcome'        => $outcome->value,
            'elapsed_ms'     => $elapsed->toMilliseconds(),
            'attempt_number' => $attemptNumber
        ]);
    }
}

# One retry after a fixed 500 ms delay.
$client = RetryingClient::create()
    ->withClient(client: new Client(config: ['timeout' => 10, 'connect_timeout' => 5]))
    ->withBackoff(backoff: FixedDelay::ofMicroseconds(microseconds: 500000))
    ->withListener(listener: new LoggingRetryListener(logger: $logger))
    ->withMaxAttempts(maxAttempts: 2)
    ->build();

$response = $client->sendRequest($request);

The listener is optional. When omitted, failed attempts are silently ignored. Because RetryingClient is itself a PSR-18 client, it plugs into anything that accepts one, including the library's own transport:

<?php

declare(strict_types=1);

use GuzzleHttp\Psr7\HttpFactory;
use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Http;

$http = Http::with(
    baseUrl: 'https://api.example.com',
    transport: NetworkTransport::with(client: $client, factory: new HttpFactory())
);

Backoff policies

Backoff computes the delay, in microseconds, slept before the next attempt. Two implementations ship with the library. Implement the interface for any other curve.

FixedDelay waits the same delay before every retry:

FixedDelay::ofMicroseconds(microseconds: 500000); # always 500 ms

ExponentialBackoff doubles a base delay of 100 ms on every attempt and spreads it with a uniformly random jitter of up to 30 percent of that value in either direction, keeping concurrent clients from retrying in lockstep against a recovering dependency:

<?php

declare(strict_types=1);

use Random\Randomizer;
use TinyBlocks\Http\Client\Resilience\ExponentialBackoff;

$backoff = ExponentialBackoff::with(randomizer: new Randomizer());

$backoff->delayFor(attempt: 1); # 100 ms, give or take up to 30 percent
$backoff->delayFor(attempt: 2); # 200 ms, give or take up to 30 percent
$backoff->delayFor(attempt: 3); # 400 ms, give or take up to 30 percent

Setting outbound headers

HeaderSettingClient is a PSR-18 decorator that sets headers on every outbound request, resolving each value at send time. Values that change between requests (a correlation identifier, a rotating token) are always current. A resolved value replaces any header of the same name already on the request, and a value resolving to an empty string leaves the request untouched for that name.

<?php

declare(strict_types=1);

use GuzzleHttp\Client;
use TinyBlocks\Http\Client\HeaderSettingClient;

$client = HeaderSettingClient::with(client: new Client(), headerValues: [
    'Correlation-Id' => static fn(): string => $correlationId->toString()
]);

It composes with the other client decorators. Wrapping it with RetryingClient re-resolves the headers on every attempt.

Configuring timeouts

PSR-18 does not standardize timeouts. Configure them on the underlying client before injection.

Guzzle:

<?php

declare(strict_types=1);

use GuzzleHttp\Client;

$client = new Client(config: ['timeout' => 30, 'connect_timeout' => 5]);

Symfony HttpClient:

<?php

declare(strict_types=1);

use Symfony\Component\HttpClient\HttpClient;
use Symfony\Component\HttpClient\Psr18Client;

$client = new Psr18Client(client: HttpClient::create(defaultOptions: ['timeout' => 30]));

Testing with InMemoryTransport

Pre-program responses with Response::with(...) and feed them to InMemoryTransport:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Response;
use TinyBlocks\Http\Client\Transports\InMemoryTransport;
use TinyBlocks\Http\Code;
use TinyBlocks\Http\Http;

$transport = InMemoryTransport::with(
    responses: [
        Response::with(code: Code::CREATED, body: ['id' => 'ch_abc123']),
        Response::with(code: Code::OK, body: ['status' => 'paid'])
    ]
);

$http = Http::create()
    ->withBaseUrl(url: 'https://api.example.com')
    ->withTransport(transport: $transport)
    ->build();

Calls consume responses in FIFO order. Exhaustion raises NoMoreResponses.

The transport records every request it receives, so a test can assert on the outbound request a consumer built without a hand-written transport double:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\Client\Response;
use TinyBlocks\Http\Client\Transports\InMemoryTransport;
use TinyBlocks\Http\Code;

$transport = InMemoryTransport::with(responses: [Response::with(code: Code::OK)]);

$transport->send(request: Request::post(url: 'https://api.example.com/charges', body: ['amount' => 1000]));

# The most recently received request, or null when none was received.
$lastReceived = $transport->lastReceivedRequest();

# Every received request, in the order they were sent.
$received = $transport->receivedRequests();

Extending with custom transports

Implement Transport to add retry, logging, circuit breaker, or any other cross-cutting concern. The decorator wraps any inner Transport. For retries at the PSR-18 client level, the library ships RetryingClient. See Retrying failed requests.

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Request;
use TinyBlocks\Http\Client\Response;
use TinyBlocks\Http\Client\Transport;
use TinyBlocks\Http\Exceptions\HttpNetworkFailed;

final readonly class RetryingTransport implements Transport
{
    public function __construct(
        private Transport $inner,
        private int $maxAttempts
    ) {
    }

    public function send(Request $request): Response
    {
        $attempt = 0;

        while (true) {
            try {
                return $this->inner->send(request: $request);
            } catch (HttpNetworkFailed $exception) {
                $attempt++;

                if ($attempt >= $this->maxAttempts) {
                    throw $exception;
                }
            }
        }
    }
}

Compose it into the facade:

<?php

declare(strict_types=1);

use TinyBlocks\Http\Client\Transports\NetworkTransport;
use TinyBlocks\Http\Http;

$http = Http::create()
    ->withBaseUrl(url: 'https://api.example.com')
    ->withTransport(
        transport: new RetryingTransport(
            inner: NetworkTransport::with(client: $client, factory: $factory),
            maxAttempts: 3
        )
    )
    ->build();

FAQ

01. Why is there a `Headerable` interface and a `Headers` value object?

Headerable is the contract implemented by classes that emit one or more header lines such as ContentType, Cookie, CacheControl, and any custom header type. Headers is the value object that carries the consolidated header set of an HTTP request or response, with case-insensitive lookup and merging.

02. Why are timeouts not part of the public API?

PSR-18 does not standardize timeouts. Exposing them in the facade would require a transport-specific contract that leaks the underlying client. Configure timeouts on the PSR-18 client before injecting it.

03. Why does `Response::raw()` throw on a synthesized response?

A response created via Response::with(...) has no PSR-7 backing - it exists only for in-process scenarios (tests, InMemoryTransport). Calling raw() in that mode is a programmer error and raises SynthesizedResponseHasNoRaw.

04. Why is path validation enforced at the resolver?

To protect the configured base URL from being hijacked by paths that contain a scheme, are protocol-relative, or carry control characters. Such inputs raise MalformedPath before the transport is invoked.

05. What happens to status codes outside the `Code` enum?

Response::from() requires a code present in the enum, which covers every RFC code in use. Non-RFC status codes are reachable through Response::raw()->getStatusCode().

License

Http is licensed under MIT.

Contributing

Please follow the contributing guidelines to contribute to the project.

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.claude		.claude
.github		.github
src		src
tests		tests
.editorconfig		.editorconfig
.gitattributes		.gitattributes
.gitignore		.gitignore
CLAUDE.md		CLAUDE.md
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
SECURITY.md		SECURITY.md
composer.json		composer.json
infection.json.dist		infection.json.dist
phpcs.xml		phpcs.xml
phpstan.neon.dist		phpstan.neon.dist
phpunit.xml		phpunit.xml

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Http

Overview

Installation

How to use

Server

Decoding a request

Creating a response

Pagination links

Setting cookies

Status code

Client

Building Http with a PSR-18 client and PSR-17 factories

Making a request

Reading the response

Query parameters

Custom headers and content type

Default headers

Setting the User-Agent

Error handling

Retrying failed requests

Backoff policies

Setting outbound headers

Configuring timeouts

Testing with InMemoryTransport

Extending with custom transports

FAQ

01. Why is there a Headerable interface and a Headers value object?

02. Why are timeouts not part of the public API?

03. Why does Response::raw() throw on a synthesized response?

04. Why is path validation enforced at the resolver?

05. What happens to status codes outside the Code enum?

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Contributing

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01. Why is there a `Headerable` interface and a `Headers` value object?

03. Why does `Response::raw()` throw on a synthesized response?

05. What happens to status codes outside the `Code` enum?

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