如何在Karate DSL中添加x-www-form-urlencoded格式的XML键值对？

I’ve run into this exact issue before—when trying to send an XML payload inside a x-www-form-urlencoded form field in Karate, using the raw request keyword won’t work because Karate defaults to serializing objects as JSON instead of form-encoded data. Let’s break down how to fix this to match your working Postman request.

The Problem with Your Current Code #

Your line And request{"our_xml" : read('classpath:xml/post.xml')} tells Karate to send a JSON object, but your server expects a form-encoded body where our_xml holds properly escaped XML content. This mismatch is why the request fails.

The Solution: Use form field + urlEncode #

Karate has built-in tools to handle form-encoded requests correctly. Here’s the corrected code:

Scenario: XXX 
Given url 'http://www.google.com/api' 
And header Content-Type = 'application/x-www-form-urlencoded' 
And form field our_xml = urlEncode(read('classpath:xml/post.xml'))
When method post
Then status 200 // Adjust this to match your expected success status code

Why This Works #

• form field: This keyword tells Karate to build a proper x-www-form-urlencoded body. It automatically handles formatting key-value pairs correctly, so you don’t have to manually construct the form string.
• urlEncode(): This function escapes special characters in your XML (like <, >, &) into their url-encoded equivalents (e.g., %3C, %3E, %26), which matches how Postman processes the XML value in your exported snippet.

Alternative: Manual Form String Construction #

If you prefer to build the request body manually (not recommended for readability), you can do this instead:

Scenario: XXX 
Given url 'http://www.google.com/api' 
And header Content-Type = 'application/x-www-form-urlencoded' 
And request 'our_xml=' + urlEncode(read('classpath:xml/post.xml'))
When method post
Then status 200

This achieves the same result, but using form field is cleaner—especially if you ever need to add more form fields later.

内容的提问来源于stack exchange，提问作者Richard Duinmaijer