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Exploring the HTTP request syntax

This section describes the HTTP request format. For details on sending HTTP requests and viewing HTTP responses, see HTTP Client.

To compose an HTTP request in the IntelliJ IDEA code editor, use the following general syntax:

Method Request-URI HTTP-Version Header-field: Header-value Request-Body

Within a request, start any line with // or # to make it a comment line.

// A basic request GET http://example.com/a/

Set names for HTTP requests

To quickly find your request in run/debug configurations, Search Everywhere, and Run Anything, you can give it a name.

Type a name above the request next to ###, # @name, or # @name =.

If a request does not have a name, IntelliJ IDEA will use its position in the request file, such as #1, as the request name. If a request file contains multiple requests with the same name, IntelliJ IDEA will append the request position number to each of the names. This will make each request name unique so that you can easily find the needed one in the Services tool window, run/debug configurations, and so on.

Use short form for GET requests

For GET requests, you can omit the request method and only specify the URI.

// A basic request http://example.com/a/

In the Java context, you can use code completion Ctrl+Space to specify URIs based on the defined @Path annotations. Any changes to the @Path annotations in Java code will be reflected in the contents of the suggestion list.

Compose several requests in a single file

Mark the end of a request by typing the ### separator below it.

// A basic request http://example.com/a/ ###
Compose another request below the separator.

// A basic request http://example.com/a/ ### // A second request using the GET method http://example.com:8080/api/html/get?id=123&value=content

Break long requests into several lines

Indent all query string lines but the first one.

// Using line breaks with indent GET http://example.com:8080 /api /html /get ?id=123 &value=content

Access a web service with authentication

Depending on the web service you are accessing, provide the basic or digest Authorization header.

// Basic authentication GET http://example.com Authorization: Basic username password ### // Digest authentication GET http://example.com Authorization: Digest username password

Provide the request message body

Inside the request, prepend the request body with a blank line and do one of the following:

Type the request body in place:

// The request body is provided in place POST http://example.com:8080/api/html/post HTTP/1.1 Content-Type: application/json Cookie: key=first-value { "key" : "value", "list": [1, 2, 3] }

If you set the Content-Type header field value to one of the supported languages, then the corresponding language fragment will be auto-injected into the HTTP request message body. If Content-Type is not specified, you can inject a language fragment manually.
In the Java context, you can use code completion Ctrl+Space to specify the Accept header field value based on the defined @Produces annotations. Any changes to the @Produces annotations in Java code will be reflected in the contents of the suggestion list.
To read the request body from a file, type the < symbol followed by the path to the file.

// The request body is read from a file POST http://example.com:8080/api/html/post Content-Type: application/json < ./input.json

Use multipart/form-data content type

Set the request's Content-Type to multipart/form-data. To send a file as part of the multipart/form-data message, include the filename parameter in the Content-Disposition header.

POST http://example.com/api/upload HTTP/1.1 Content-Type: multipart/form-data; boundary=boundary --boundary Content-Disposition: form-data; name="first"; filename="input.txt" // The 'input.txt' file will be uploaded < ./input.txt --boundary Content-Disposition: form-data; name="second"; filename="input-second.txt" // A temporary 'input-second.txt' file with the 'Text' content will be created and uploaded Text --boundary Content-Disposition: form-data; name="third"; // The 'input.txt' file contents will be sent as plain text. < ./input.txt --boundary--

Disable following redirects

When an HTTP request is redirected (a 3xx status code is received), the redirected page response is returned. In the Services tool window, you can view the redirected page response as well as all redirections that happened during the request.

You may want to disable following redirects. In this case, the actual redirect response header (such as 301 or 302) is returned.

Before the request, add a comment line with the @no-redirect tag.

// @no-redirect example.com/status/301

If you already have a redirected request, you can click Disable next to the Redirections list in the Services tool window. This will add the @no-redirect tag to the initial request.

Disable saving requests to requests history

If necessary, you can prevent saving a request to the requests history. This can be helpful in case a request contains some sensitive data, and you don't want to log it.

Before the request, add a comment line with the @no-log tag.

// @no-log GET example.com/api

Disable saving received cookies to the cookies jar

If necessary, you can prevent saving the received cookie to the cookies jar. This way you will avoid removing the unwanted cookies from the http-client.cookies file manually.

Before the request, add a comment line with the @no-cookie-jar tag.

// @no-cookie-jar GET example.com/api

Use variables

When composing an HTTP request, you can parametrize its elements by using variables. A variable can hold the values for the request's host, port, and path, query parameter or value, header value, or arbitrary values used inside the request body or in an external file.

Provide a variable inside the request

Enclose the variable in double curly braces as {{variable}}.

The variable's name may only contain letters, digits, the underscore symbols _, or the hyphen symbols -. The variables' values can be any of the following:

Provided explicitly per environment by means of the environment variables
Generated dynamically by means of the $uuid, $timestamp, and $randomInt predefined dynamic variables
Defined programmatically in response handler scripts by means of the client.global.set method.

Environment variables

Environment variables let you store a set of environment definitions inside your project. For example, instead of providing a hostname in your request explicitly, you can create the {{host}} variable in different environments: a local hostname in the development environment and a public hostname in the production environment. You can then use the Run with list on the top of the current .http file editor to select an environment:

No Environment: if this option is selected, no environment will be used when you run requests in the current file. Select it if your request does not contain any variables.
Environment name (such as production or development): the selected environment will be used for all requests in the current file, and you won't need to select it when you click . This can be helpful if you want to run multiple requests with the same environment and don't want to select it each time you run a request.
<Select Environment Before Run>: with this option selected, you'll have to choose an environment each time you click . This can be convenient if you often switch environments and want to explicitly select them for each run to make sure you execute requests with the needed environments.

The selected environment will be used as the default one when Viewing a structure of the request, opening the request in the browser, executing the request, and creating a run/debug configuration for it.

Define environment variables

Environment variables are defined in the environment files.

On top of the request's editor panel, in the Run with list, select where you want to add an environment:
- Select Add Environment to Public File… if you want the environment to be public. This will add the environment to the http-client.env.json file. This file can contain common variables such as host name, port, or query parameters, and is meant to be distributed together with your project.
- Select Add Environment to Private File… if you want the environment to be private. This will add the environment to the http-client.private.env.json file. This file might include passwords, tokens, certificates, and other sensitive information. The values of variables that are specified in the http-client.private.env.json file override the values in the public environment file.
Populate the created files with the desired variables.

The following sample http-client.env.json environment file defines two environments: development and production. The additional http-client.private.env.json file holds the sensitive authorization data.

{ "development": { "host": "localhost", "id-value": 12345, "username": "", "password": "", "my-var": "my-dev-value" }, "production": { "host": "example.com", "id-value": 6789, "username": "", "password": "", "my-var": "my-prod-value" } }

{ "development": { "username": "dev-user", "password": "dev-password" }, "production": { "username": "user", "password": "password" } }

The example HTTP request is as follows:

GET http://{{host}}/api/json/get?id={{id-value}} Authorization: Basic {{username}} {{password}} Content-Type: application/json { "key": "{{my-var}}" }

Before you execute the request, IntelliJ IDEA lets you choose an execution environment using the Run with list on top of the request's editor panel.

Depending on your choice, the resulting request will be one of the following:

GET http://localhost/api/json/get?id=12345 Authorization: Basic dev-user dev-password Content-Type: application/json { "key": "my-dev-value" }

GET http://example.com/api/json/get?id=6789 Authorization: Basic user password Content-Type: application/json { "key": "my-prod-value" }

If a variable is unresolved when executing a request, IntelliJ IDEA displays a notification letting you quickly create, update, or choose a different execution environment.

Unresolved Variable in HTTP request notification

Dynamic variables

Dynamic variables generate a value each time you run a request:

$uuid: generates a universally unique identifier (UUID-v4)
$timestamp: generates the current UNIX timestamp
$randomInt: generates a random integer between 0 and 1000.

For example:

GET http://localhost/api/get?id={{$uuid}}

Handle the response

You can handle the response using JavaScript. Type the > character after the request and specify the path and name of the JavaScript file or put the response handler script code wrapped in {% ... %}.

GET https://httpbin.org/get > /path/to/responseHandler.js

GET https://httpbin.org/get > {% client.global.set("my_cookie", response.headers.valuesOf("Set-Cookie")[0]); %}

For more information, see HTTP Response handling API reference.

Redirect the response

You can redirect a response to a file. Use >> to create a new file with a suffix if it already exists and >>! to rewrite the file if it exists. You can specify an absolute path or relative to the current HTTP Request file. You can also use variables in paths, including environment variables and the following predefined variables:

{{$projectRoot}} points to the project root: .idea
{{$historyFolder}} points to .idea/httpRequests/

The following example HTTP request creates myFile.json in myFolder next to the HTTP Request file and redirects the response to it. If the file already exists, it creates myFile-1.json and so on.

POST https://httpbin.org/post Content-Type: application/json { "id": 999, "value": "content" } >> myFolder/myFile.json

The following example HTTP request creates myFile.json in .idea/httpRequests/. If the file already exists, it overwrites the file. It also handles the response with the handler.js script that resides in the project root.

POST https://httpbin.org/post Content-Type: application/json { "id": 999, "value": "content" } > {{$projectRoot}}/handler.js >>! {{$historyFolder}}/myFile.json

Last modified: 12 September 2022

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Source: https://www.jetbrains.com/help/idea/exploring-http-syntax.html