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--- integration_with_other_systems [2022/01/14 16:48] – ↷ Links adapted because of a move operation 127.0.0.1
+++ integration_with_other_systems [2024/04/04 10:18] (current) – [Troubleshooting CURL requests from WebHMI] emozolyak
@@ Line 118: / Line 118: @@
 If the curl stability is the issue in your project, you can implement HTTP requests using custom protocol. See the [[http_get_custom |example]]
+</WRAP>
+==== HTTP / HTTPS requests ====
+<WRAP center round info 80%>
+Please note that HTTPS requests are only possible in **WebHMI Pro** version and virtualization images.
 </WRAP>
+==== Troubleshooting CURL requests from WebHMI ====
+When troubleshooting your requests, you can turn on verbose information in your script. Please refer to the example below:
+<code lua>
+function main (userId)
+    local res = ""
+    local c = cURL.easy_init()
+    c : setopt{ url = 'http://danepubliczne.imgw.pl/api/data/hydro/id/153160210',
+              timeout = 30,
+              httpheader = {'Accept: application/json',
+                            'Content-Type: gzip, deflate, br',
+                            -- 'Host: <calculated when request is sent>',
+                        }
+             }
+     -- sw on verbose info
+     c : setopt{[cURL.OPT_VERBOSE] = 1}
+     c : setopt{[cURL.OPT_DEBUGFUNCTION] = function(...)
+                for i, v in pairs(arg) do DEBUG(i .. ' ' .. v) end
+                return 0
+         end }
+     c : perform{writefunction = function(str)
+                res = res .. str
+            end}
+        c : close()
+        INFO(res)
+        if (res == '') or (res == '%[%]')then
+            ERROR('No data in response!')
+        else
+            INFO('\n' .. res)
+        end
+end
+</code>