从 linux 中的 curl 响应中检查 json 字段

Question

I am writing a script in gitlab-ci file and the server I am using is Linux to run the pipeline.

Now I want to make two API call and 2nd call is dependent on the 1st

for example

URL= you can take any HTTPS endpoint (i guess it really doesn't matter)

jsonResponse=$(curl -d $requestJson -X POST $FIRST_URL)

echo $jsonResponse

[{"result":"Success"}]

Based on the result field (success/failure) I want to make another API call using curl. something like below

if response[0].result=success then "curl -d $requestJson -X POST $SECOND_URL" else exit 1

Note that the response will be in Array.

Answer 1

What you could possibly do is that you will save the output from 1st API call to a file (api1-output.json) and then pass it to the next correspondent job from where you can read that output and act based on its response.

Example in your .gitlab-ci.yml file:

api1_execution:
   image: your_image
   script:
      - curl -XGET https://my-api1-endpoint.com/api/getSomething > scripts/api1-output.json
   artifacts:
      paths:
         - scripts/api1-output.json


api2_execution:
   image: your_image
   script:
      - API1_OUTPUT= $(cat scripts/api1-output.json)
      - // do whatherever you want with API1_OUTPUT
      - // fire 2nd API call

For parsing and reading JSON output I highly recommend that you use tool called jQ

The above example can serve to you just as an idea how it can be done from my perspective.

Answer 2

I want to make two rest API call and 2nd rest call is dependent on the 1st response

Please reason in terms of protocols: so HTTPS (or HTTP ) and REST . Read much more about both of them.

You could use some existing JSON library (eg jansson in C, or jsoncpp in C++) and combine them with some HTTP client library (eg libcurl ) and/or HTTP server library (eg libonion ).

You might be interested by existing C++ frameworks such as Qt or POCO .

You should look at recent language implementations, such as Go or Rust or Ocaml or SBCL or Node.JS . They provide useful libraries (related to HTTP and REST, both client and server side).

You might consider using scripting languages like Python or Guile or Lua or Perl or Ruby , etc..... They also have relevant libraries for your needs.

Read the documentation of the programming languages implementations and libraries you want to use.

I tend to believe that GNU bash is not the best alternative for your needs (consider also at least GNU gawk ).

Look also on both github and gitlab for open source implementations relevant to your needs. Once these are specified (perhaps usingEBNF notation for the messages you want to implement; read also about SOAP and JSONRPC ) on paper, the implementation is fairly easy.

Be sure to read Advanced Linux Programming and syscalls(2) and sockets(7) .

What will correct way to validate the field

First, specify on paper what are valid fields.

Also, write several examples of valid fields, and of invalid fields. Then consider using regex(7) . Also study for inspiration the source code of existing open source software similar to your needs .

See also this .