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Hello I have a problem with http VIâ€™s and external web services (RESTful) and Iâ€™m using LabVIEW 2013. In NetBeans I create a project with a GET web service from a table in MySQL, so I use http VIâ€™s for accessing the service (blog diagram .png), receiving the information in JSON (front panel.png) and took the information I needed (in this case the â€œslActualValueâ€ value). I have a program that inserts new values in the database and in chrome the service works fine but if a want to do the Vi in a while loop to update or receive new values, the the next JSON data form the web service is the same as the first call, but if I go to the NetBeans project and do the deploy again the JSON data changes. I ask about this problem from the experts in web services (RESTful) and they say that is the cookies in the LabVIEW program, so I create add a cookie file .txt but im not confident about the format of the file(the example is in this post) or if there something amiss in the LabVIEW VIâ€™s Cookie.txt file # Netscape HTTP Cookie File # http://curl.haxx.se/rfc/cookie_spec.html # This file was generated by libcurl! Edit at your own risk. UNKNOWN FALSE 10.18.9.32:8080/arto FALSE 0 ID 0
Hi Guys, It has been a while but I'm back :-) I'm having some 'problems' with http requests .... Project summary: LabVIEW 2010 Application that reads sensor logs from a database. The application gets its data via http requests: --> architecture of the project --> data must be accessible via web-service Example: http://localhost:8085/sensorservice/sensor/test/temperature..... (and some paramaters about the amount of data to return.) is entered in the LabVIEWHTTPClient.lvlib:GET.vi and I receive my data in the body and header controls. So far so good. Every data request takes about 0.3 s Not bad .... but .... all sensors that are read in the application are handled sequentially in a FOR loop. So 60 sensors *0.3s == 18s update rate. Not fast enough for my customer. The LabVIEWHTTPClient.lvlib:GET.vi is reentrant and it allocates an instance for each clone. So i quickly made an active object for each sensor and call the LabVIEWHTTPClient.lvlib:GET.vi by ref with x08 as option when i open the vi ref. It returns the data BUT ... requests are still sequential and not parallel :-( LabVIEWHTTPClient.lvlib:GET.vi blockdiagram is protected with a password, but I assume it still blocks because of a dll call. Did anyone make an application with parallel http requests ? Thx. Wim