Hi Hernán, It is great that you are using ZnClient and are providing feedback.
On 21 Jul 2013, at 08:58, Hernán Morales Durand <hernan.mora...@gmail.com> wrote: > I'm testing the OpenCalais web service. This is a web service which > needs an API key to be used (registering takes only 1 minute in > http://www.opencalais.com/APIkey). To check the service first I've used > a Python script, taken from [1] > > import httplib2 > import json > LOCAL_API_KEY = '' # Aquire this by registering at the Calais site > CALAIS_TAG_API = 'http://api.opencalais.com/tag/rs/enrich' > # Some sample text from a news story to pass to Calais for analysis > test_body = """ > Some huge announcements were made at Apple's Worldwide Developer's > Conference Monday, including the new mobile operating system iOS 5, PC > software OS X Lion, and the unveiling of the iCloud. > """ > # header information need by Calais. For more info see > http://www.opencalais.com/documentation/calais-web-service-api/api-invocation/rest > headers = { > 'x-calais-licenseID': LOCAL_API_KEY, > 'content-type': 'text/raw', > 'accept': 'application/json', > } > # Create your http object > http = httplib2.Http() > # Make the http post request, passing the body and headers as needed. > response, content = http.request(CALAIS_TAG_API, 'POST', > headers=headers, body=test_body) > jcontent = json.loads(content) # Parse the json return into a python dict > print json.dumps(jcontent, indent=4) # Pretty print the resulting > dictionary returned. > > The Python script works fine for me. I have tried to translate the code > above, but my version in Pharo 2.0 using Zinc returns "I Read a > ZnResponse(415 Unsupported Media Type text/plain 365B)" > > | httpClient localApiKey | > localApiKey := ''. " my API key " > httpClient := ZnClient new > logToTranscript; > url: 'http://api.opencalais.com/tag/rs/enrich'; > method: #POST; > headerAt: 'x-calais-licenseID' put: localApiKey; > headerAt: 'accept' put: 'application/json'; > headerAt: 'content-Type' put: 'text/raw'; > contents: 'Some huge announcements were made at Apple''s > Worldwide > Developer''s Conference Monday, including the new mobile operating > system iOS 5, PC software OS X Lion, and the unveiling of the iCloud.'. > httpClient execute. > > Additionally the request returns the following message: > > 'Document conversion error. Please make sure that the content-type > (passed through the paramsXML) matches this document contents. > [ErrorMessage: > com.clearforest.platform.system.CLFRuntimeException: There is no > converter for this type of URI > "file:/C:/CLFSW/v71/ct/bin/../../../v71/ct/var/dptemp/prvt/228295-app9/dp/papi/data/1374378595643-DF317E60-6634505.asc" > ]' > > From what I could see, a difference is the 'text/raw' > content-type is passed in Python's httplib2, but in Zinc is overriding > by 'text/plain' it in #acceptEntityDescription: ? Any hints? You were _very_ close. Indeed #contents: by default (without an explicit #contentReader set) will do something very generic. Setting the content-type as a header won't change the fact that the content-type of the entity wins, as you correctly said, in #acceptEntityDescription: The solution is to explicitly make your own entity, like this: | httpClient localApiKey text | localApiKey := 'xxx'. " my API key " text := 'Some huge announcements were made at Apple''s Worldwide Developer''s Conference Monday, including the new mobile operating system iOS 5, PC software OS X Lion, and the unveiling of the iCloud.'.httpClient := ZnClient new systemPolicy; url: 'http://api.opencalais.com/tag/rs/enrich'; headerAt: 'x-calais-licenseID' put: localApiKey; entity: (ZnEntity with: text type: 'text/raw'); accept: 'application/json'; contentReader: [ :entity | NeoJSONReader fromString: entity contents ]; post. Since content comes back as JSON, I parsed it already using NeoJSON (which you can easily load using the configuration browser). Using #systemPolicy will ensure that you get an error when the result is not 200 OK and application/json. It worked for me: I made an account and got a result back. HTH, Sven > Hernán > > [1] > http://www.flagonwiththedragon.com/2011/06/08/dead-simple-python-calls-to-open-calais-api/ -- Sven Van Caekenberghe Proudly supporting Pharo http://pharo.org http://association.pharo.org http://consortium.pharo.org
