Problem
1.I have a sns service which is running on Google App Engine
2.The sns service is using go to run as the back ending side
3.The sns service is using a crob job to request Api A
4.The Api A is adding another http request(request to Api B) into taskqueue
5.The taskqueue is executed immediately after the request of Api A
6.The request of Api B is executed
7.The Api B responded with the code 308
Problem Summary
job cron(request for Api A) -> Api A -> Task queue(stack request for Api B) ->Api B -> some execution
Api A responded with 200 Api B responded with 308
Question
Why Api B is respond with the code of 308?
Complement
By the way the following sequence is successful
post man (request for Api A) -> Api A -> Task queue(request for Api B) ->Api B -> some execution
Api A responded with 200 Api B responded with 200
When I use post man to request Api A the following request for Api B was respond with 200
The way I did with taskqueue is like
params := url.Values{}
params.Set("dollSpaces", strings.Join(dollSpaces, ","))
t := taskqueue.NewPOSTTask("/path", params)
req.Header.Set("X-AppEngine-QueueName", "mailqueue")
c := appengine.NewContext(req)
taskqueue.Add(c, t, "my queue")
The Log from Google Cloud Platform is like the following
Response of Api A
2019-01-01 10:00:00.001 JST
GET
200
193 B
577 ms
AppEngine-Google; (+http://code.google.com/appengine)
/path/ApiAPath
0.1.0.1 - - [01/Jan/2019:10:00:00 +0900] "GET /path/ApiAPath HTTP/1.1" 200 193 - "AppEngine-Google; (+http://code.google.com/appengine)" "aaa.aaa.com" ms=577 cpu_ms=3 cpm_usd=2.8039999999999998e-8 loading_request=0 instance=asda1231313asdasd123123asda123 app_engine_release=1.9.71 trace_id=123123123dsfasf123123zafasdasd
Response of Api B
2019-01-01 10:00:00.100 JST
POST
308
95 B
2 ms
AppEngine-Google; (+http://code.google.com/appengine)
/ApiBPath
0.1.0.2 - - [01/Jan/2019:10:00:00 +0900] "POST /ApiBPath HTTP/1.1" 308 95 http://aaa.aaa.com/path/ApiAPath "AppEngine-Google; (+http://code.google.com/appengine)" "aaa.aaa.com" ms=2 cpu_ms=221 cpm_usd=1.3802e-8 loading_request=0 instance= asda1231313asdasd123123asda123 app_engine_release=1.9.71 trace_id= 123123123dsfasf123123zafasdasd