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Description:

dio http formatter

A simple Dio interceptor for pretty printing the HTTP request/response (using the awesome
package Logger) to be printed in the console for easier debugging and sharing.
Different content types are supported and pretty printed such as:

application/json
application/x-www-form-urlencoded
text/html

Getting started #
1- Install the package in your project:
flutter pub get dio_http_formatter
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or if not for Flutter:
pub get dio_http_formatter
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2- Add the interceptor to your Dio instance like:

final _dio = Dio();
_dio.interceptors.add(HttpFormatter());
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Dio Version Map #
For a certain version of Dio, use the following table to find the correct version of this package to use:

Dio Version
Package Version

4.x.x
2.x.x

5.x.x
3.x.x

Options #
Below are the optional parameters that can be specified for the formatter to customize what and how the HTTP request and response is printed.

Property
Type
Default Value

includeRequest
bool
true

includeRequestHeaders
bool
true

includeRequestQueryParams
bool
true

includeRequestBody
bool
true

includeResponse
bool
true

includeResponseHeaders
bool
true

includeResponseBody
bool
true

logger
Logger
PrettyPrinter()

Examples #
POST request [application/json] #
await _dio.post('https://postman-echo.com/post',
data: <String, dynamic>{'foo': 'foo'},
options: Options()
..headers = <String, dynamic>{
'my-custom-header': 'my-custom-header',
'content-type': 'application/json'
});
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┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ ⤴ REQUEST ⤴
│
│ POST https://postman-echo.com/post
│ content-type: application/json
│ my-custom-header: my-custom-header
│ content-length: 13
│
│
│ {
│ "foo": "foo"
│ }
│
│ ⤵ RESPONSE [200/OK] [Time elapsed: 1080 ms]⤵
│
│ connection: [keep-alive]
│ set-cookie: [sails.sid=s%3AlO2moZlJ_-LGJZdq_o0KRpliqamhCecq.lNnUP5X%2Fvr%2BXi2an7q6GJki9DPmDQyPAyBW7p117ijM; Path=/; HttpOnly]
│ date: [Mon, 22 Jun 2020 17:29:07 GMT]
│ vary: [Accept-Encoding]
│ content-length: [417]
│ etag: [W/"1a1-14yzanqIFzi16qAA3YVbkp9Acl8"]
│ content-type: [application/json; charset=utf-8]
│
│
│ {
│ "args": {},
│ "data": {
│ "foo": "foo"
│ },
│ "files": {},
│ "form": {},
│ "headers": {
│ "x-forwarded-proto": "https",
│ "x-forwarded-port": "443",
│ "host": "postman-echo.com",
│ "x-amzn-trace-id": "Root=1-5ef0ea63-50bc2440e0e07883458a067f",
│ "content-length": "13",
│ "user-agent": "Dart/2.8 (dart:io)",
│ "content-type": "application/json",
│ "my-custom-header": "my-custom-header",
│ "accept-encoding": "gzip"
│ },
│ "json": {
│ "foo": "foo"
│ },
│ "url": "https://postman-echo.com/post"
│ }
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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POST request [multipart/form-data] #
await dio.post(
"https://postman-echo.com/post",
data: FormData.fromMap({
"foo": "foo",
"bar": MultipartFile.fromBytes([1, 2, 3, 4, 5, 6])
}),
);
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┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ ⤴ REQUEST ⤴
│
│ POST https://postman-echo.com/post
│ content-type: multipart/form-data; boundary=--dio-boundary-0846883596
│ content-length: 234
│
│
│ {
│ "foo": "foo",
│ "bar": "[application/octet-stream; length=6]"
│ }
│
│ ⤵ RESPONSE [200/OK] [Time elapsed: 1431 ms]⤵
│
│ etag: [W/"238-Drbr+mbesAC7mnUT1/6HdwqJbOg"]
│ connection: [keep-alive]
│ content-type: [application/json; charset=utf-8]
│ set-cookie: [sails.sid=s%3AYZPFhMKwqVTkLbZkRSbdqY_ZGZYFul8h.UrGXXLdzjfYJEdEVOlpQND2Ms3KnpKomTNQh42u3tS4; Path=/; HttpOnly]
│ date: [Sun, 19 Mar 2023 12:39:21 GMT]
│ content-length: [568]
│
│
│ {
│ "args": {},
│ "data": {},
│ "files": {
│ "undefined": "data:application/octet-stream;base64,AQIDBAUG"
│ },
│ "form": {
│ "foo": "foo"
│ },
│ "headers": {
│ "x-forwarded-proto": "https",
│ "x-forwarded-port": "443",
│ "host": "postman-echo.com",
│ "x-amzn-trace-id": "Root=1-64170279-48f590a477b666d63975dd13",
│ "content-length": "234",
│ "user-agent": "Dart/2.19 (dart:io)",
│ "content-type": "multipart/form-data; boundary=--dio-boundary-0846883596",
│ "accept-encoding": "gzip"
│ },
│ "json": null,
│ "url": "https://postman-echo.com/post"
│ }
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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POST request [application/x-www-form-urlencoded] #
await dio.post(
"https://postman-echo.com/post",
data: {
"foo": "foo",
"bar": "bar",
},
options: Options(
contentType: Headers.formUrlEncodedContentType,
),
);
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┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ ⤴ REQUEST ⤴
│
│ POST https://postman-echo.com/post
│ content-type: application/x-www-form-urlencoded
│ content-length: 15
│
│
│ {
│ "foo": "foo",
│ "bar": "bar"
│ }
│
│ ⤵ RESPONSE [200/OK] [Time elapsed: 1419 ms]⤵
│
│ etag: [W/"213-RckysDJgyaHU3rsP8vCoDnqI4Pg"]
│ connection: [keep-alive]
│ content-type: [application/json; charset=utf-8]
│ set-cookie: [sails.sid=s%3AxDq5jvVLfuAkxh5o0pUhZOLzkqPt4xBz.apV3a%2FKrhiKWA%2B7foUqihO0BMGTnCOwVSiiW93CBozo; Path=/; HttpOnly]
│ date: [Sun, 19 Mar 2023 12:42:13 GMT]
│ content-length: [531]
│
│
│ {
│ "args": {},
│ "data": "",
│ "files": {},
│ "form": {
│ "foo": "foo",
│ "bar": "bar"
│ },
│ "headers": {
│ "x-forwarded-proto": "https",
│ "x-forwarded-port": "443",
│ "host": "postman-echo.com",
│ "x-amzn-trace-id": "Root=1-64170325-433157c952cf5ed84f36f867",
│ "content-length": "15",
│ "user-agent": "Dart/2.19 (dart:io)",
│ "content-type": "application/x-www-form-urlencoded",
│ "accept-encoding": "gzip"
│ },
│ "json": {
│ "foo": "foo",
│ "bar": "bar"
│ },
│ "url": "https://postman-echo.com/post"
│ }
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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Successful GET request [text/html] #
await _dio.get('https://example.org');
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┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ ⤴ REQUEST ⤴
│
│ GET https://example.org
│
│
│ ⤵ RESPONSE [200/OK] [Time elapsed: 963 ms]⤵
│
│ cache-control: [max-age=604800]
│ last-modified: [Thu, 17 Oct 2019 07:18:26 GMT]
│ date: [Mon, 22 Jun 2020 17:34:41 GMT]
│ content-encoding: [gzip]
│ vary: [Accept-Encoding]
│ age: [336678]
│ content-type: [text/html; charset=UTF-8]
│ server: [ECS (dcb/7FA3)]
│ accept-ranges: [bytes]
│ content-length: [648]
│ etag: ["3147526947"]
│ x-cache: [HIT]
│ expires: [Mon, 29 Jun 2020 17:34:41 GMT]
│
│
│ <!doctype html>
│ <html>
│ <head>
│ <title>Example Domain</title>
│
│ <meta charset="utf-8" />
│ <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
│ <meta name="viewport" content="width=device-width, initial-scale=1" />
│ <style type="text/css">
│ body {
│ background-color: #f0f0f2;
│ margin: 0;
│ padding: 0;
│ font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
│
│ }
│ div {
│ width: 600px;
│ margin: 5em auto;
│ padding: 2em;
│ background-color: #fdfdff;
│ border-radius: 0.5em;
│ box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
│ }
│ a:link, a:visited {
│ color: #38488f;
│ text-decoration: none;
│ }
│ @media (max-width: 700px) {
│ div {
│ margin: 0 auto;
│ width: auto;
│ }
│ }
│ </style>
│ </head>
│
│ <body>
│ <div>
│ <h1>Example Domain</h1>
│ <p>This domain is for use in illustrative examples in documents. You may use this
│ domain in literature without prior coordination or asking for permission.</p>
│ <p><a href="https://www.iana.org/domains/example">More information...</a></p>
│ </div>
│ </body>
│ </html>
│
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
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Successful GET request with Query Params [text/html] #
await _dio.get('https://example.com',
queryParameters: {'limit_start': 0, 'search_term': 'dart'});
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┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ ⤴ REQUEST ⤴
│
│ GET https://example.com
│
│ ===== Query Parameters =====
│ limit_start : 0
│ search_term : dart
│
│ ⤵ RESPONSE [200/OK] [Time elapsed: 1204 ms]⤵
│
│ last-modified: [Thu, 17 Oct 2019 07:18:26 GMT]
│ cache-control: [max-age=604800]
│ date: [Fri, 26 Nov 2021 12:04:26 GMT]
│ vary: [Accept-Encoding]
│ content-encoding: [gzip]
│ content-length: [648]
│ age: [86638]
│ etag: ["3147526947+gzip"]
│ content-type: [text/html; charset=UTF-8]
│ x-cache: [HIT]
│ server: [ECS (oxr/8317)]
│ expires: [Fri, 03 Dec 2021 12:04:26 GMT]
│
│
│ <!doctype html>
│ <html>
│ <head>
│ <title>Example Domain</title>
│
│ <meta charset="utf-8" />
│ <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
│ <meta name="viewport" content="width=device-width, initial-scale=1" />
│ <style type="text/css">
│ body {
│ background-color: #f0f0f2;
│ margin: 0;
│ padding: 0;
│ font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
│
│ }
│ div {
│ width: 600px;
│ margin: 5em auto;
│ padding: 2em;
│ background-color: #fdfdff;
│ border-radius: 0.5em;
│ box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
│ }
│ a:link, a:visited {
│ color: #38488f;
│ text-decoration: none;
│ }
│ @media (max-width: 700px) {
│ div {
│ margin: 0 auto;
│ width: auto;
│ }
│ }
│ </style>
│ </head>
│
│ <body>
│ <div>
│ <h1>Example Domain</h1>
│ <p>This domain is for use in illustrative examples in documents. You may use this
│ domain in literature without prior coordination or asking for permission.</p>
│ <p><a href="https://www.iana.org/domains/example">More information...</a></p>
│ </div>
│ </body>
│ </html>
│
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

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