http 0.12.0

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http #

A composable, Future-based library for making HTTP requests.

This package contains a set of high-level functions and classes that make it easy to consume HTTP resources. It's platform-independent, and can be used on both the command-line and the browser. Currently the global utility functions are unsupported on the browser; see "Using on the Browser" below.

Using #

The easiest way to use this library is via the top-level functions, although they currently only work on platforms where dart:io is available. They allow you to make individual HTTP requests with minimal hassle:

import 'package:http/http.dart' as http;

var url = "";, body: {"name": "doodle", "color": "blue"})
    .then((response) {
  print("Response status: ${response.statusCode}");
  print("Response body: ${response.body}");

If you're making multiple requests to the same server, you can keep open a persistent connection by using a Client rather than making one-off requests. If you do this, make sure to close the client when you're done:

var client = new http.Client();
    body: {"name": "doodle", "color": "blue"})
  .then((response) => client.get(response.bodyFields['uri']))
  .then((response) => print(response.body))

You can also exert more fine-grained control over your requests and responses by creating Request or StreamedRequest objects yourself and passing them to Client.send.

This package is designed to be composable. This makes it easy for external libraries to work with one another to add behavior to it. Libraries wishing to add behavior should create a subclass of BaseClient that wraps another Client and adds the desired behavior:

class UserAgentClient extends http.BaseClient {
  final String userAgent;
  final http.Client _inner;

  UserAgentClient(this.userAgent, this._inner);

  Future<StreamedResponse> send(BaseRequest request) {
    request.headers['user-agent'] = userAgent;
    return _inner.send(request);

Using on the Browser #

The HTTP library can be used on the browser via the BrowserClient class in package:http/browser_client.dart. This client translates requests into XMLHttpRequests. For example:

import 'dart:async';
import 'package:http/browser_client.dart';

main() async {
  var client = new BrowserClient();
  var url = '/whatsit/create';
  var response =
      await, body: {'name': 'doodle', 'color': 'blue'});
  print('Response status: ${response.statusCode}');
  print('Response body: ${response.body}');

0.12.0 #

New Features #

  • The regular Client factory constructor is now usable anywhere that dart:io or dart:html are available, and will give you an IoClient or BrowserClient respectively.
  • The package:http/http.dart import is now safe to use on the web (or anywhere that either dart:io or dart:html are available).

Breaking Changes #

  • In order to use or reference the IoClient directly, you will need to import the new package:http/io_client.dart import. This is typically only necessary if you are passing a custom HttpClient instance to the constructor, in which case you are already giving up support for web.

0.11.3+17 #

  • Use new Dart 2 constant names. This branch is only for allowing existing code to keep running under Dart 2.

0.11.3+16 #

  • Stop depending on the stack_trace package.

0.11.3+15 #

  • Declare support for async 2.0.0.

0.11.3+14 #

  • Remove single quote ("'" - ASCII 39) from boundary characters. Causes issues with Google Cloud Storage.

0.11.3+13 #

  • remove boundary characters that package:http_parser cannot parse.

0.11.3+12 #

  • Don't quote the boundary header for MultipartRequest. This is more compatible with server quirks.

0.11.3+11 #

  • Fix the SDK constraint to only include SDK versions that support importing dart:io everywhere.

0.11.3+10 #

  • Stop using dart:mirrors.

0.11.3+9 #

  • Remove an extra newline in multipart chunks.

0.11.3+8 #

  • Properly specify Content-Transfer-Encoding for multipart chunks.

0.11.3+7 #

  • Declare compatibility with http_parser 3.0.0.

0.11.3+6 #

  • Fix one more strong mode warning in http/testing.dart.

0.11.3+5 #

  • Fix some lingering strong mode warnings.

0.11.3+4 #

  • Fix all strong mode warnings.

0.11.3+3 #

  • Support http_parser 2.0.0.

0.11.3+2 #

  • Require Dart SDK >= 1.9.0

  • Eliminate many uses of Chain.track from the stack_trace package.

0.11.3+1 #

  • Support http_parser 1.0.0.

0.11.3 #

  • Add a Client.patch shortcut method and a matching top-level patch method.

0.11.2 #

  • Add a BrowserClient.withCredentials property.

0.11.1+3 #

  • Properly namespace an internal library name.

0.11.1+2 #

  • Widen the version constraint on unittest.

0.11.1+1 #

  • Widen the version constraint for stack_trace.

0.11.1 #

  • Expose the IOClient class which wraps a dart:io HttpClient.

0.11.0+1 #

  • Fix a bug in handling errors in decoding XMLHttpRequest responses for BrowserClient.

0.11.0 #

  • The package no longer depends on dart:io. The BrowserClient class in package:http/browser_client.dart can now be used to make requests on the browser.

  • Change MultipartFile.contentType from dart:io's ContentType type to http_parser's MediaType type.

  • Exceptions are now of type ClientException rather than dart:io's HttpException.

0.10.0 #

  • Make BaseRequest.contentLength and BaseResponse.contentLength use null to indicate an unknown content length rather than -1.

  • The contentLength parameter to new BaseResponse is now named rather than positional.

  • Make request headers case-insensitive.

  • Make MultipartRequest more closely adhere to browsers' encoding conventions.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  http: ^0.12.0

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:http/http.dart';
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Learn more about scoring.

We analyzed this package on Jun 14, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.9+1

Health suggestions

Fix lib/src/browser_client.dart. (-5.36 points)

Analysis of lib/src/browser_client.dart reported 11 hints, including:

line 30 col 17: Unnecessary new keyword.

line 44 col 15: Unnecessary new keyword.

line 51 col 21: Unnecessary new keyword.

line 52 col 5: Future results in async function bodies must be awaited or marked unawaited using package:pedantic.

line 55 col 41: Unnecessary new keyword.

Fix lib/src/request.dart. (-4.41 points)

Analysis of lib/src/request.dart reported 9 hints, including:

line 24 col 11: Unnecessary new keyword.

line 88 col 22: Unnecessary new keyword.

line 112 col 13: Unnecessary new keyword.

line 122 col 22: Unnecessary new keyword.

line 124 col 13: Unnecessary new keyword.

Fix lib/src/response.dart. (-4.41 points)

Analysis of lib/src/response.dart reported 9 hints, including:

line 32 col 34: Use = to separate a named parameter from its default value.

line 33 col 22: Use = to separate a named parameter from its default value.

line 34 col 32: Use = to separate a named parameter from its default value.

line 46 col 34: Use = to separate a named parameter from its default value.

line 47 col 22: Use = to separate a named parameter from its default value.

Fix additional 14 files with analysis or formatting issues. (-31.15 points)

Additional issues in the following files:

  • lib/src/multipart_request.dart (8 hints)
  • lib/src/utils.dart (8 hints)
  • lib/src/base_request.dart (7 hints)
  • lib/src/io_client.dart (6 hints)
  • lib/src/multipart_file.dart (6 hints)
  • lib/src/base_response.dart (5 hints)
  • lib/src/byte_stream.dart (5 hints)
  • lib/src/mock_client.dart (4 hints)
  • lib/src/multipart_file_io.dart (4 hints)
  • lib/src/base_client.dart (3 hints)
  • lib/src/streamed_response.dart (3 hints)
  • lib/src/streamed_request.dart (2 hints)
  • lib/http.dart (1 hint)
  • lib/src/boundary_characters.dart (1 hint)

Maintenance suggestions

Package is getting outdated. (-73.70 points)

The package was last published 90 weeks ago.

Maintain an example. (-10 points)

Create a short demo in the example/ directory to show how to use this package.

Common filename patterns include main.dart, example.dart, and http.dart. Packages with multiple examples should provide example/

For more information see the pub package layout conventions.

The package description is too short. (-4 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.61.0 <3.0.0
async >=1.10.0 <3.0.0 2.4.1
http_parser >=0.0.1 <4.0.0 3.1.4
path >=0.9.0 <2.0.0 1.7.0
Transitive dependencies
charcode 1.1.3
collection 1.14.12
meta 1.1.8
source_span 1.7.0
string_scanner 1.0.5
term_glyph 1.1.0
typed_data 1.1.6
Dev dependencies
test ^1.3.0