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Webmaster Forum / ColdFusion / Advanced Techniques / September 2006consuming a webservice
I am attempting to create a webservice from one site to be consumed by another site. I have gone through various webservices tuts in the distant past but I am stuck on this one. On server A I have the following CFC... <cfcomponent hint="Returns minimal member data for consumption"> <cffunction name="getMembersbyState" access="public" returntype="query" hint="Members by State" description="FInd and return member listing by state"> <cfargument name="state" required="yes" default=""> <cfset var rsGetResults=""> <cfquery name="rsGetMembers" datasource="#request.dsn#" username="#request.dsnusrnm#" password="#request.dsnpwd#" > SELECT member_id, city as member_City, company_name as member_Name, dba_name as member_DBA FROM members_tbl WHERE Active = 1 AND state = '#argument.state#' ORDER BY company_name </cfquery> <cfreturn rsGetMembers> </cffunction> </cfcomponent> Now simply browsing to this page on my local server results in the cfc description details. Browsing to in on the server - results in the following error... Could not import the tag library specified by "../administrator/cftags/". The following error was encountered: D:\inetpub\wwwroot-ct\CFIDE\componentutils\..\administrator\cftags. Please ensure that you have specified a valid tag library. The CFML compiler was processing: * a cfimport tag beginning on line 3, column 2. The error occurred in D:\inetpub\wwwroot-ct\CFIDE\componentutils\login.cfm: line 3 Called from D:\inetpub\wwwroot-ct\CFIDE\componentutils\Application.cfm: line 55 Called from D:\inetpub\wwwroot-ct\CFIDE\componentutils\Application.cfm: line 55 1 : <cfsilent> 2 : <!--- Import L10N Taglib (System Generated) ---> 3 : <cfimport prefix="admin" taglib="../administrator/cftags/"> 4 : 5 : <!--- Establish page locale, default is english (en). ---> Does anyone have any pointers? PLEASE. I have attempted to map the custom tag path to my cfc folder in the site - via the system control panel. ( Using Crystaltech as host) Should I be creating a diff. mapping of some kind? I can add a mapping instead of a custom tag path but I have never done this thing before so I completely lost. Thanks so much. Chris The first thing I noticed was that your access is wrong. For a function to be a web service it needs to be access="remote" not access="public". Also you might try returning a simple string until you know you have the web service running and connecting, then move up to complex variables like a query record set. Sorry 'bout that. I have tried the remote and was testing public. forgot to put it back. Anyway thanks for the simplicity test. A note: if I run the file directly on the server with the ?wsdl - I do in fact get what I expect. > The first thing I noticed was that your access is wrong. For a function > to be a web service it needs to be access="remote" not access="public". > > Also you might try returning a simple string until you know you have the > web service running and connecting, then move up to complex variables > like a query record set.  SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email I thought it might be worth someone being able to see the link and test it themselves :) http://www.femsa.org/cfc/getMembers.cfc?WSDL This outputs as expected. http://www.femsa.org/cfc/getMembers.cfc Yells at me. I have added the firstws method as shown in this article... http://www.adobe.com/devnet/coldfusion/articles/beginner_ws.html Accessing the wsdl link from outside the server now reports this error... Web service operation "firstws" with parameters {} could not be found. > The first thing I noticed was that your access is wrong. For a function > to be a web service it needs to be access="remote" not access="public". > > Also you might try returning a simple string until you know you have the > web service running and connecting, then move up to complex variables > like a query record set. SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email http://www.femsa.org/cfc/getMembers.cfc?WSDL This outputs as expected. http://www.femsa.org/cfc/getMembers.cfc Yells at me. I received this error for both of these links. 5 >= 0 The error occurred in D:\inetpub\femsa\cfc\application.cfc: line 1 1 : <cfapplication name = "cfc"> 2 : <cfset request.dsn="femsaDSN"> 3 : <cfset request.dsnusrnm="spartacus"> Check into the documentation for using an application.cfc with web services and the request functions. They have some very specific interactions, and the documentation gives some warnings on what you can and can not do if you want to publish a web service. I merely stuck in some basic application 'stuff' b/c I had read quite a few posts of the same troubles (some of them anyway) and the simple inclusion of an application file in the same directory with the cfc resolved some things. It did not for me. Try the links now. I have removed the application.cfm file. > http://www.femsa.org/cfc/getMembers.cfc?WSDL This outputs as expected. > http://www.femsa.org/cfc/getMembers.cfc Yells at me. [quoted text clipped - 12 lines] > interactions, and the documentation gives some warnings on what you can > and can not do if you want to publish a web service. SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email Another thought that just occurred to me. You can not use normal state creating functionality with web services. They do not pass the CF tokens that are required for session state management. Chris, I tried those links above and read the error message. It seems very clear to me that the problem is the directory you are referencing "administrator/cftags" is not located where you think it is or where you think CF will begin looking for it. When you put "../administrator/cftags" CF starts from the current directory of the template w/ the cfimport. It goes up one directory, then down to administrator and cftags. Does this reflect your directory structure? I'm guessing not. The WSDL will work, because your webservice function is properly formatted and unless the code is executed you will not encounter the error you are experiencing. You are not referencing anything in CF mappings because you've got ".." in taglib attribute. The CFDocs are clear on this, either you reference from the webroot with a leading "/", reference a cfmapping with a leading "/, or the path is relative from the current directory of the template. http://livedocs.macromedia.com/coldfusion/7/htmldocs/wwhelp/wwhimpl/common/html/ wwhelp.htm?context=ColdFusion_Documentation&file=part_cfm.htm BTW, I'm not sure if you did this to debug or if it's always like this but since your app is out on the Internet I highly recommend you disable robust exceptions once you're done. Use a global error handler to log the error and/or email the details to you. -Tim I am starting to get a hold on this I think. Part of what confused me is that the directory structure you mentioned below Tim - is not in ANY of my files. I believe it is referenced on the host server in some manner. My cfc has five lines at this point and says simply this... <cfcomponent hint="Returns minimal member data for consumption"> <cffunction name="firstws" access="remote" returntype="string"> <cfreturn "DevNet is great!"> </cffunction> </cfcomponent> If you look at my original post with the complex function in it - it also has no reference to the administrator/cftags directory. So I am at a loss except that the host is forcing this tag library to be imported in some way. As for the robust error handling - I am not sure why the cfc gives me this error b/c if you break the rest of the site - I am emailed a report and the user is displayed a simple request or exception error as I making use of the cferror tag in my application.cfm file in this manner... <cferror type="request" template="ErrorRequest.cfm" mailto="xxxx.xxxx.com"> <cferror type="exception" template="ErrorException.cfm" mailto="xxxx.xxxx.com"> If you know of a better way please let me know - If I am missing something I am not afraid to ask. Thanks Tim, Chris > Chris, > [quoted text clipped - 22 lines] > > -Tim SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email Chris, I apologize. I must have been a bit sleepy yesterday when I answered this question. There are a couple of things going on. The first is that your webservice component is working just fine at this time. I'll get back to that in a second. When you use the URL http://www.femsa.org/cfc/getMembers.cfc, it in turn redirects you to http://www.femsa.org/CFIDE/componentutils/cfcexplorer.cfc?method=getcfcinhtml&na me=cfc.getMembers&path=/cfc/getMembers.cfc which is where you're really getting the error message. What's happening here is that you are actually invoking an out of the box CF application with inspects your CFC. The error that you're getting is because CF is unable to find the directory D:\inetpub\wwwroot-ct\CFIDE\administrator\cftags. I think CFIDE is a virtual directory and either the security settings are so tight that the service account running ColdFusion cannot access the administrator/cftags directory or there's something wrong w/ the install. For instance I was able to locate this resource http://www.femsa.org/CFIDE/images/required.gif, but not http://www.femsa.org/CFIDE/administrator/aboutcf.cfm or http://www.femsa.org/CFIDE/administrator/cfadmin.css Getting back to the webservice you should test it like so http://www.femsa.org/cfc/getMembers.cfc?method=firstws and http://www.femsa.org/cfc/getMembers.cfc?method=members. The global error handler in your app is not executing, because application.cfm from D:\inetpub\wwwroot-ct\CFIDE\componentutils\Application.cfm is being executed and that doesn't have an error handler. Does this make sense so far? At this point it's either a permissions or install issue happening when you try to inspect your CFC, but I think this is besides the point, because your original question was about your getMembersByState webservice. Can you put that function back in and then use a method call like http://www.femsa.org/cfc/getMembers.cfc?method=getMembersByState&state=IL or whatever is appropriate for your service. Looking at your original code. I only see 2 issues, 1 the access must be remote. This was pointed out, and 2 you must use the "arguments" scope w/ an s at the end not "argument". Hope this helps. -Tim Tim - Thank you so much, that at least explained to me what in the world I was doing wrong in testing the silly thing. So now I have put back the original query function to pull all the data. And using this link as you mentioned http://www.femsa.org/cfc/getMembers.cfc?method=getMembersByState&state=IL works great. You can even still call http://www.femsa.org/cfc/getMembers.cfc?method=members and get the silly little text. Now I m probably just not understanding how to call the cfc at this point. I thought I had it right but I am getting a blank page when calling the cfc from another domain via cfinvoke. Here is what I am doing... The cfc states this: <cffunction name="getMembersByState" access="remote" returntype="query" hint="Members by State" description="FInd and return member listing by state"> <cfargument name="state" required="yes" default=""> <cfset var rsGetMembers=""> <cfquery name="rsGetMembers" datasource="#request.dsn#" username="#request.dsnusrnm#" password="#request.dsnpwd#" > SELECT member_id, city as member_City, company_name as member_Name, dba_name as member_DBA FROM members_tbl WHERE Active = 1 AND state = '#arguments.state#' ORDER BY company_name </cfquery> <cfreturn rsGetMembers> </cffunction> The cfinvoke states this: <cfinvoke webservice="http://www.femsa.org/cfc/getMembers.cfc?wsdl" method="getMembersByState" returnvariable="rsGetMembers"> <cfinvokeargument name="state" value="al"/> </cfinvoke> <cfoutput query="rsGetMembers"> #member_name#<br /> </cfoutput> Now I would think this should return a list of member names - or at least if I used a cfdump - I would see the whole thing. But niether the code above, nor a cfdump results in anythin on the page. Am I missing somehting in how I call the cfc? Thanks for all the patience and help Tim, Chris > Chris, > [quoted text clipped - 41 lines] > > -Tim SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email I was getting a blank page merely b/c I had turned on error handling and had not actual error page defined yet. I have turned it off and now I am getting the dreaded Web service operation "getMembersByState" with parameters {} could not be found. YUCK. Also I had another question - I have a basic understanding of structures and arrays so I thought this might work as a way to call the cfinvoke but I can't test it until I have resolved the issue above. Can I call the function using argumentcollection="#URL#" if the state is defined in the url? But lets worry about the first problem first right :) Thanks again, Chris > Tim - Thank you so much, that at least explained to me what in the world > I was doing wrong in testing the silly thing. So now I have put back [quoted text clipped - 100 lines] >> >> -Tim SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email <cfinvoke webservice="http://www.femsa.org/cfc/getMembers.cfc?wsdl" method="getMembersByState" returnvariable="rsGetMembers"> <cfinvokeargument name="state" value="al"/> </cfinvoke> I just ran this code from my system and I did not get an error, I got an empty query. I think your web service is working correctly. I suspect you are having difficulty consuming it do to caching issues. When CF consumes a web service it create a stub that maps the web service and it's functions. If the profile of the web service is changed, this stub needs to be refreshed. Go to the Web Services section of the CF administrator under the Data & Services section. Delete any Active ColdFusion Web Services that refers to this web service url. That should force CF to refresh the stub the next time the service is called. Is there a way to force this w/o access to the server? I can ask crystaltech to do it for me but I don't have a dedicated server - yet so I can't do it myslef. > <cfinvoke webservice="http://www.femsa.org/cfc/getMembers.cfc?wsdl" > method="getMembersByState" [quoted text clipped - 14 lines] > to this web service url. That should force CF to refresh the stub the > next time the service is called. SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email Is there a way to force this w/o access to the server? I can ask crystaltech to do it for me but I don't have a dedicated server - yet so I can't do it myslef. I think there is an undocumented feature to do this through the service factory, but I don't know the details. You can also create a new "web service" by changing the url profile of the service. Change some part of this string "http://www.femsa.org/cfc/getMembers.cfc?wsdl" and you have a "different" web service. I.E. if you change your webservice to getMembers2.cfc would be a new web service. Hi Ian, Well I simply asked CT to do it and they did so. So now I simply get Web service operation "getMembersByState" with parameters {STATE=al} could not be found. The page I am running it from is this ... http://firegrantdata.com/consumefemsa.cfm?state=al I used the argumentcollection="#URL#" instead of the cfarguments at this time. Chris > Is there a way to force this w/o access to the server? I can ask > crystaltech to do it for me but I don't have a dedicated server - yet so [quoted text clipped - 8 lines] > "different" web service. I.E. if you change your webservice to > getMembers2.cfc would be a new web service. SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email <cfinvoke webservice="http://www.femsa.org/cfc/getMembers.cfc?wsdl" method="getMembersByState" returnvariable="rsGetMembers"> <cfinvokeargument name="state" value="#url.state#"/> </cfinvoke> <cfinvoke webservice="http://www.femsa.org/cfc/getMembers.cfc?wsdl" method="getMembersByState" argumentcollection="#URL#" returnvariable="rsGetMembers"> </cfinvoke> Well both of these worked for me, I now have a query of all your IL members. Ok it finally works... http://firegrantdata.com/consumefemsa.cfm?state=il will get me the data. Thank you all for the great help. Sorry if I was being so ignorant the whole time. as it turns out Ian - thank you - AL returned a blank page simply b/c there was no data to return. Duh! Thanks Tim as well. I never really knew how to test the cfc directly - correctly. Now I do. Thanks so much guys for your patience. (groveling :) Now to embed that in my brain so I can learn something else this afternoon. Chris > Chris, > [quoted text clipped - 41 lines] > > -Tim SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email Interestingly enough - if you use argumentcollection="#URL#" and you have too many arguments - it throws an error. So I must use <cfargument and only pass on argument. too bad - it would seem to be easier to pass all the urls vars and let the cfc sort them out. But hey - less server tug this way I guess. Chris > I am attempting to create a webservice from one site to be consumed by > another site. I have gone through various webservices tuts in the [quoted text clipped - 58 lines] > Thanks so much. > Chris SignatureChris Luksha Echo Web Services Making Your Website Resound 603-831-0099 http://www.echowebservices.com/ CAN-SPAM Compliant Email Newsletters - only $.05 per Subscriber http://www.echowebservices.com/email |
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