Curl vs wget1/11/2024 To print metadata results to screen, simply put the request in double quotes and put curl on the front: It also doesn't have a default timeout, like wget. Wget -O myDataRequest.tgz -load-cookies cookies.txt ""Ĭurl is an alternative to wget, which can download files from HTTP requests, but can also print the results of a metadata request to the screen, which can be handy for quick queries. Once the request has been made, an email will be sent to the registered address with a link to the data itself.įor more information on using scripted access to this data link, see the Asynchronous Data Requests page.Ĭheck the job using the URL in the field, e.g.,:Īnd once the phase is COMPLETED, the data is downloadable from the URL in the field, e.g.,: Wget -load-cookies cookies.txt "" -O request_response.xml Once you have the cookie file, then you can make your asynchronous request using this cookie file and adding RETRIEVAL_ACCESS=DEFERRED, for example: Note that if your password contains special characters, you might need to replace those characters with the URL encoded equivalent, e.g., replace & with %26 Wget -keep-session-cookies -save-cookies COOKIEFILE -post-data 'username=YOURUSERID&password=YOURPASSWORD' "" Use the following syntax replacing COOKIEFILE with your preferred path and filename, and YOURUSERID and YOURPASSWORD appropriately: In this case, it's safer to use an asynchronous request as detailed below.Īsynchronous requests require a login ( register if you don't have a login) and for wget this means obtaining a cookie file. Note that wget has a default timeout of 900 seconds (15 minutes) and so if the request is complex, it's possible that it may timeout. Wget -O myMetadataRequest.csv "'%25Electric_Field%25'" While a metadata request will return the format requested: The -O (O for Oscar) option will name the file with the extension you give it, so take care that the extension is the correct one.įor example, a data request will return a. The content disposition option will give it an appropriate name and extension. Put it in double quotes (make sure 'smart quotes' are not enabled)Īdd one of the following to the beginning: Take the https form of the request (data doesn't change, but metadata requests need URL encoding - see metadata page) Wget and curl are used to put a request directly on the command line WGET I've had to do both in Appian, so please feel free to ask any follow-up questions if this is still an issue.WGET and CURL - Direct command line tools If you want a full automation, you will need a timer to do this every X minutes, or to further automate the login to get those cookies and then execute that request. There is a catch - your session may be timed out by your environment unless you send out these WGET/CURL requests every X minutes to keep alive your session. In other words, if you get those cookies from Chrome Inspect/DevTools, and set them as headers in WGET or CURL, you will be able to get past the login screen and into the log item (and anywhere else in Appian - a similar trick works for most websites). I did this with Python (Requests package, by sending those three headers highlighted as a dictionary of cookies). For a successful query, include those three cookie items in your CURL request, with valid XYZ from an active session: JSESSIONID= XXXX _appianCsrfToken=YYYY _appianMultipartCsrfToken=ZZZZ. In Chrome Inspect/DevTools, you can get this under the Network tab, and clicking on the name of the log file that you queried then going to Headers (example image included below). In order to access via CURL/WGET, you need to imitate the three "cookie" headers (shown in Chrome Inspect/DevTools). When you query a log item, you are doing a GET request to, for example, Here is some insight into how Appian authentication works:
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