Wolfram Language

Cloud & Web Interfaces

Simulate the Wolfram Engine Cloud Server

Web development for the Wolfram Cloud can be largely done without even uploading anything to the cloud. The behavior of functions such as Delayed, FormFunction, and APIFunction can be seen using the GenerateHTTPResponse function. Everything about the HTTPResponse can be examined, including the status code, content type, headers, and body. Web functions can be written, changed, and tested automatically using these capabilities. The response can even be examined in a local web browser by clicking the circular status disk in the HTTPResponse summary box.

Simulate a request to a Delayed cloud object that builds a table of information about the seven mountains closest to the user.

In[1]:=
Click for copyable input
response = GenerateHTTPResponse[ Delayed[Map[ Composition[ Replace[#, {n_, el_, r_, pos_} :> {n, ToString[Round[el]], StringJoin[ Riffle[Switch[r, {_String ..}, r, _List, CommonName[r], _, r], ", "]], ToString[GeoDistance[$GeoLocation, pos]], ToString@Latitude[pos], ToString@Longitude[pos]}] &, MountainData[#, {"Name", "Elevation", "MountainRange", "Position"}] &], GeoNearest["Mountain", $GeoLocation, 7]], "CSV"] ]
Out[1]=

Click the green status circle to open a local copy of the response.

In[2]:=
Click for copyable input
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Simulate a request to an APIFunction.

In[3]:=
Click for copyable input
response = GenerateHTTPResponse[ APIFunction["ticker" -> "TickerSymbol", EntityValue[#ticker, EntityProperty["Financial", "Last"]] &], <| "Query" -> {"ticker" -> "FDX"}|>]
Out[3]=

Examine parts of the response.

In[4]:=
Click for copyable input
response[{"StatusCode", "ContentType", "Body"}]
Out[4]=

Test the response to bad input.

In[5]:=
Click for copyable input
response = GenerateHTTPResponse[ APIFunction["ticker" -> "TickerSymbol", EntityValue[#ticker, EntityProperty["Financial", "Last"]] &, {"WL", None, "WL"}], <| "Query" -> {"ticker" -> "134"}|>]
Out[5]=

Examine the error response body.

In[6]:=
Click for copyable input
response["Body"]
Out[6]=

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