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httpGet Operation - behaviour on HTTP Status 4040 ?


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(Title should read 404 not 4040)

 

Hi

If I use <arc:call op="httpGet" in="http"> , will a 404 response raise an exception which I need to catch or can I check the http:statuscode ?

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Best answer by James B 23 May 2024, 22:01

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Userlevel 2

Hi Russel, 

 

Do you mean you want to capture the server response code? Could you please elaborate a bit more to help us understand the issue? A 404 error usually indicates that the server cannot find the web page requested by the user.

 

 

 

 

 

Userlevel 5
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Hi

 

The API endpoint I am calling uses 404 to indicate a record has not been found and returns

{"message":"No orders found"}

as the body. which fairly common practice for accessing data resources.

I have managed to use try/catch around my httpGet and it successfully catches the 404, but cannot read http:content

Looks like I will just have to assume that 404 means “No orders found”

 

Userlevel 2

Hi Russel,

 

Did you try accessing it using response http:content attribute?

<arc:set attr="http.URL" value="https://SomeURL" />
<arc:set attr="http.user" value="user" />
<arc:set attr="http.password" value="password" />
<arc:call op="httpGet" in="http" out="response">
<arc:set attr="output.data" value="[response.http:content]" />
</arc:call>

<arc:set attr="output.filename" value="httpResponseContent.txt" />
<arc:push item="output" />

In the above sample script, the response from the API will be saved in output file.

Do you see any error?

Userlevel 5
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I did, but when the status is 404 Cdata Arc didn’t populate content

Userlevel 6
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In ArcScript, the body of the HTTP error is not returned with the exception code, but you can see the response error if you enable the logging for the connector:

 

<!-- read this log after the fact -->
<arc:set attr="http.logfile" value="/somepath/HTTPLog.txt" />
<arc:set attr="http.verbosity" value="3" />

<arc:set attr="http.URL" value="https://SomeURL" />
<arc:set attr="http.user" value="user" />
<arc:set attr="http.password" value="password" />
<arc:call op="httpGet" in="http" out="response">
<arc:set attr="output.data" value="[response.http:content]" />
</arc:call>

<arc:set attr="output.filename" value="httpResponseContent.txt" />
<arc:push item="output" />

 

But there is not a real time examination of the HTTP body of a 4xx error in the exception thrown. 

The REST connector is a better way in the flow to manage endpoints that return a body that you need to examine - in the Advanced tab, you will find an option to create output messages for errors so you can act according to the body of the error reply:

 

 

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