build.message will break JSON format

[Vergil0327]

This is my webhook part of .drone.yml

template: |
{
"event": "{{ build.event }}",
"owner": "{{ repo.owner }}",
"repo": "{{ repo.name }}",
"message": "{{ build.message }}",
}

When I push commit and my commit message is "test" (git commit -m "test"),
webhook will parse result as below

Output result from drone.io:

HEADERS: map[Content-Type:[application/json]]
REQUEST BODY: {
"event": "push",
"owner": "owner",
"repo": "test",
"message": "test <--- new line will break JSON format and ERROR occured
"
}

How can I fix this ?

[tboerger]

How should a new line break the JSON format? It's still properly quoted and valid JSON.

[kotlarz]

I am also having this issue, no JSON parser (that are compliant with the JSON spec) will accept this object.
For example: https://docs.python.org/3.7/library/json.html

JSON (JavaScript Object Notation), specified by RFC 7159 (which obsoletes RFC 4627) and by ECMA-404, is a lightweight data interchange format inspired by JavaScript object literal syntax (although it is not a strict subset of JavaScript [1] ).

Per RFC7159, Section 7. Strings:

All Unicode characters may be placed within the quotation marks, except for the characters that must be escaped: quotation mark, reverse solidus, and the control characters (U+0000 through U+001F).

U+000A, LINE FEED (LF), and U+000D, CARRIAGE RETURN (CR), need therefore to be escaped as per the RFC7159 spec.
To add: any of the above-mentioned characters need to be escaped, so the build.message should preferably run through a JSON parser.

[lpreterite]

The RenderTrim method of drone-template-lib is processed, but there is no space before the newline character at the end of the message, resulting in invalid processing.

My message example:

更新个信息看看先\n

RenderTrim

func RenderTrim(template string, playload interface{}) (string, error) {
	out, err := Render(template, playload)
	return strings.Trim(out, " \n"), err
}

[tboerger]

That's not the issue. You are getting the implementation of trim wrong, you can see it at https://golang.org/pkg/strings/#Trim.

[tboerger]

Just a guess, but maybe you can use to Json from http://masterminds.github.io/sprig/defaults . html to properly format the message in json.

[probwebdev]

Seems that trim is a way to got - {{trim build.message}}.

[ducdung8491]

Trigger from git source add \n affter commit message

You can try
"message": "${DRONE_COMMIT_MESSAGE//"/}"