HTTR.jl

What is HTTR.jl

HTTR.jl is a 100% Julia implementation of the R httr2 package.

The main purpose of HTTR.jl is to bridge the gap between the web and data analysis in Julia, offering a flexible and efficient interface for making HTTP requests while adhering to web standards. It leverages packages like EzXML.jl, HTTP.jl, JLD2.jl, JSON3.jl, and URIs.jl to create and handle requests and manage various types of web data.

Installation

For the development version:

using Pkg

Pkg.add(url = "https://github.com/TidierOrg/HTTR.jl.git")

What functions does HTTR.jl support?

HTTR.jl currently supports:

Category	Function/Type
Create and Modify Requests	request(), Request, req_body_raw(), req_body_file(), req_body_json(), req_headers(),req_method(), req_progress(),req_timeout(), req_url(), req_user_agent()
Debugging and Testing Requests	last_response(), last_request(), req_verbose(), with_verbosity()
Requests Authentication	req_auth_basic(), req_auth_bearer_token()
Perform a Request	req_perform(), req_retry()
Perform Multiple Requests	(No functions included)
Handle the Response	resp_body_raw(), resp_has_body(), resp_body_string(), resp_body_json(),resp_body_html(), resp_body_xml(), resp_check_content_type(), resp_content_type(), resp_encoding(), resp_date(), resp_headers(), resp_header(), resp_header_exists(), resp_link_url(), resp_raw(), resp_retry_after(), resp_status(), resp_status_desc(), resp_is_error(),resp_check_status(), resp_url(), resp_url_path(), resp_url_query(), resp_url_queries()
Miscellaneous Helpers	curl_help(), secret_make_key(), secret_has_key(), url_parse(), url_build()
OAuth	oauth_cache_path(), OAuthClient, oauth_client(), oauth_redirect_uri(), OAuthToken, oauth_token()

Examples

Creating and modifying the request:

HTTR.Request is the equivalent to R's httr2_request S3 class. Several functions can be used to modify the request returned by this request. These functions can modify the request's methods, body, headers, etc.

The HTTR.request() function creates the HTTR.Request type. Without a body the request method defaults to GET. By using the @chain macro, a request can be performed then the response can be then read as a String using the resp_body_string() function. If no response function is used the request will return the response as the type HTTP.Messages.Response from the HTTP.jl package:

using HTTR, Chain

@chain request("https://dummy.restapiexample.com/api/v1/employees") begin
    req_perform()
    resp_body_string()
    println()
end

To create a POST request add a request body to the request, one way to do this is using the req_body_json() function and adding the content type of application/json, so that the request can be recognized as json. The response can be then read as a json using the resp_body_json() function:

using HTTR, Chain

@chain request("https://dummy.restapiexample.com/api/v1/create") begin
    req_body_json(Dict("name" => "test", "salary" => "123", "age" => "23"))
    req_headers(["Content-Type" => "application/json"])
    req_perform()
    resp_body_json()
    println()
end