HTTP 500 triggering pipeline API with variables
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Triggering a pipeline with variables defined via the projects/:id/pipeline API route hangs for 11 seconds and then spits out an HTTP 500.
For easy reproduction, I've created a project, user, associated access token, and crappy pipeline that just prints a variable, so you can just paste these commands directly to trigger the demo pipeline.
The pipeline can be invoked just fine without variables:
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"Any attempt to add the variables field causes the API call to hang and then returning {"message":"500 Internal Server Error"}. Either I'm doing something profoundly silly, or this is quite broken :D
All of these fail like that:
# Empty-string variables?
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master -F "variables=" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"
# Empty-array variables?
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master -F "variables=[]" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"
# Array-of-weird-objects?
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master -F "variables=[{'key'=>'MY_VARIABLE', 'value'=>'FOO'}]" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"
# Array-of-weird-objects, minus quotes??
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master -F "variables=[{'key'=>'MY_VARIABLE', 'value'=>'FOO'}]" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"
# Doing it as per the trigger variable documentation
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F ref=master -F "variables[MY_VARIABLE]=FOO" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"
# Maybe it likes actual JSON?
curl -X POST --header "Private-Token: Fp_crazaAzBpaY-CCps7" -F "variables=[{'key': 'MY_VARIABLE', 'value': 'foo' }]" -F "ref=master" "https://gitlab.com/api/v4/projects/BuggyMcBugface%2FTriggerFail/pipeline"While we're on this subject, is there any reason why the syntax for trigger variables differs from the syntax for specifying variables through the projects/:id/pipeline API? This seems unnecessarily confusing.
The former uses variables[example]=foo, but the other (apparently) wants [{ 'key' => 'example', 'value' => 'foo'}].
So:
- Am I doing something wrong? If so, you probably want to avoid hanging to so long and ideally yield a nicer error.
- Is it just broken?
- Consider unifying the API formats for variable passing.