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On this page
  • The Result Structure
  • HTTP Arguments
  • HTTPParam
  • Param Types
  • Param Arguments

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  1. BoxLang Framework

HTTP/S Calls

BoxLang makes it really easy to interact with any HTTP/S endpoint via the http tag/construct. The http call will generate an HTTP/S request and parse the response into a nice BoxLang structure.

bx:http url="https://www.google.com/" result="result" {
    bx:httpparam name="q" type="url" value="test";
}
dump( result )

You can use ANY http method in the http calls, the default is a GET operation.

As you can see from the example above, you can pass parameters to the HTTP request by using the child httpparam construct. This parameter can be of many different types: header, body, xml, cgi, file, url, formfield, cookie depending on the requirements of the http endpoint.

The Result Structure

The result structure will contain the following keys:

Key
Description

statusCode

The HTTP response code and reason string.

fileContent

The body of the HTTP response. Usually a string, but could also be a Byte Array.

responseHeader

A structure of response headers, the keys are header names and the values are either the header value or an array of values if multiple headers with the same name exist.

errorDetail

An error message if applicable.

mimeType

The mime type returned in the Content-Type response header.

text

A boolean indicateing if the response body is text or binary

charset

The character set returned in the Content-Type header.

header

All the http response headers as a single string.

HTTP Arguments

This construct accepts many arguments with different features you can use when executing http/s calls, below we list just the most common ones.

Argument
Type
Default
Description

url

URL

The http/s endpoint to hit

port

numeric

80/443

The port of the endpoint to hit. 80 for http and 443 for https

method

string

GET

The http method to use.

username

string

An optional server username

password

string

An optional server password

useragent

string

BoxLang

The user agent to simulate for the request

charset

string

utf-8

The encoding to use

resolveUrl

boolean

false

No does not resolve URLs in the response body. As a result, any relative URL links in the response body do not work. Yes resolves URLs in the response body to absolute URLs, including the port number, so that links in a retrieved page remain functional.

redirect

boolean

true

If the response header includes a location field, determines whether to redirect execution to the URL specified in the field.

timeout

numeric

unlimited

A value in seconds of the max time to take for the request.

getAsBinary

string

auto

If yes, convert to BoxLang binary type, No keep as text, auto let BoxLang detect and convert as necessary

result

string

http

The name of the variable you want the result structured returned into

multipart

boolean

false

Tells BoxLang to send all data specified by httpparam type="formField" tags as multipart form data, with a Content-Type of multipart/form-data.

Basically, you can do any type of http/s calls and consume any type of RESTFul webservices with a nice BoxLang syntax!

HTTPParam

As mentioned before in our example we can use the httpparam construct to pass parameters to the http/s endpoint. The parameters can be of different types as we can see in the following table.

httpParam type=""  name=""  value=""  file=""  encoded=""  mimetype="";

Param Types

Type
Description

header

Specifies an HTTP header. Does not URL encode the value

body

Specifies that the value is the body of the HTTP request.

xml

Identifies the request as having a content-type of text/xml and specifies that the value attribute contains the body of the HTTP request.

cgi

Same as header but URL encodes the value by default.

file

Tells BoxLang to send the contents of the specified file.

url

Specifies a URL query string name-value pair to append to the http url attribute. URL encodes the value.

formfield

Specifies a form field to send. URL encodes the value by default.

cookie

Specifies a cookie to send as an HTTP header. URL encodes the value.

Param Arguments

The available param arguments to the httpparam construct are:

Argument
Type
Default
Description

type

string

The type of data from the available types above

name

string

The variable name for the data

value

string

The value of the variable

file

path

Applies to file type; ignored for all other types. The absolute path to the file that is sent with the request.

encoded

boolean

false

Applies to formfield and cgi types; ignored for all other types. Specifies whether to URLEncode the form field or header.

mimetype

string

Applies to file type; invalid for all other types. Specifies the MIME media type of the file contents. The content type can include an identifier for the character encoding of the file; for example, text/html; charset=ISO-8859-1 indicates that the file is HTML text in the ISO Latin-1 character encoding.

Here is another example for you:

bx:http url="https://myrestapp.com/user" result="result" method="post" {
        bx:httpparam name="x-api-token" type="header" value="123";
        bx:httpparam
                type="body"
                value=serializeJson( '{
                        name : "luis",
                         age : 2
                }' );

}
dump( result )
PreviousRequest Interception PointsNextJava Interop

Last updated 2 months ago

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