05 communications
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This document provides an overview of basic HTTP requests and communications in Meme IDE projects. It describes setting up a server entry, example request and response data, using the fetch command to make requests, and includes boilerplate code for a successful response function that checks the status and payload of the response.
05 communications
- 1. Basic Communications ● HTTP Requests ● Posting of data ● Simple Example App
- 2. Download CommsTest Project ● This presentation is accompanies by an example Meme IDE project that can be downloaded from: ● http://www.memeapps.com/tutorials//commsprojectpage.php
- 3. Define a Server Entry ● Project properties ● Servers tab – Server name. Used in functions – Address. Server address without protocol – Protocol. HTTP or HTTPS – Minimum Connection
- 4. Server Entry for Example Project
- 5. demo.memeide.com ● Example data for sample projects ● fetch_test.xml <Person fname="Andrew" sname="Whitmore"> </Person>
- 7. Form
- 8. Single Button ● Click and it runs the function: ● SendRequest function sendRequest() { fetch("TestServer", "fetch_test.xml", "Person", "successfulResponse"); }
- 9. The 'fetch' command ● Fetch ● Server name - “TestServer” ● Path - “fetch_test.xml” ● Record Type - “Person” ● Response Callback – “successfulResponse” – Called when request complete – Not written yet – Up next ......
- 10. SuccessfulResponse function function successfulResponse(response : Response) { var result : Person; var status = response.status; if (status == 200) { result = response.payload; notify("Got a person, fname=" + result.fname); } else { notify("Error, status=" + status); } } Mandatory Parameter of type Response
- 11. 'Response' Record Type ● Built-in ● Attributes ● Status – response code (200 for success) ● Payload – a record in this case a 'Person' ● Message – any error message
- 12. SuccessfulResponse function function successfulResponse(response : Response) { var result : Person; Test the status for 200 var status = response.status; if (status == 200) { Display the name attribute result = response.payload; notify("Got a person, fname=" + result.fname); } else { notify("Error, status=" + status); } If there is an error, } display the status code
- 13. Boilerplate code ● Startup function ● open(“MainForm”);
- 14. The App