RL-ARM User's Guide
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RL-ARM User's Guide

RL-RTX RL-FlashFS RL-TCPnet TCP Socket Opening TCP Connection TCP Active Open TCP Passive Open Sending TCP Data Example for Sending Data Multiple TCP Connections UDP Socket Opening UDP Connection Sending UDP Data When DHCP Enabled When ARP Cache Empty Example for Sending Data IP Multicasting Multiple UDP Connections Configuring TCPnet Static Configuration System Definitions Ethernet Network Interface PPP Network Interface SLIP Network Interface UDP Socket TCP Socket BSD Socket HTTP Server Telnet Server TFTP Server TFTP Client FTP Server FTP Client DNS Client SMTP Client SNMP Agent Runtime Configuration Library Files Using RL-TCPnet Stand Alone With RTX Kernel Event Driven Operation IP Address Assignment Ethernet Interface PPP Interface SLIP Interface Localhost Applications HTTP Server Script Language CGI Functions Ajax Support Using XML XML Example How it works SOAP Support SOAP Interface Large POST Messages Web Pages Default Page Error Pages Web on SD Card Web Update File System Interface Http Caching How it works Internal Web External Web Multi-user Authentication Using RAM File System FCARM File Converter PRINT Directive NOPRINT Directive PAGEWIDTH Directive PAGELENGTH Directive ROOT Directive Telnet Server Command Line Interface Multi-user Authentication Sending Reply Message Short Reply Long Reply Continuous Screen Update TFTP Server File System Interface TFTP Client File System Interface FTP Server File System Interface Multi-user Authentication Supported Commands FTP Client File System Interface SMTP Client SNMP Agent MIB Database MIB Interface MIB Entry MIB Table DNS Resolver Starting DNS Device Drivers Ethernet Driver Interrupt Mode Modem Driver Serial Driver Using Serial Link Cable Connection Modem Connection Windows Dial-up Add Direct Serial Link New Dial-up Connection Configure PPP Dial-up Configure SLIP Dial-up Debugging Enabling Debug Debug Level Redirecting Output Function Overview BSD Routines CGI Routines Ethernet Routines Error Function FTP Routines HTTP Routines IGMP Routines Miscellaneous Routines Modem Routines PPP Routines Serial Routines SLIP Routines SMTP Routines SNMP Routines System Functions TCP Routines Telnet Routines TFTP Routines UDP Routines RL-CAN RL-USB Example Programs Library Reference Appendix

SOAP Interface

The SOAP messages in HTTP consist of the POST request, submitted by the client, and a response generated by the Web server. The Embedded Web server handles the SOAP messages different. Instead of processing them internally and notifying the user via user callback functions, the Web server delivers a complete SOAP message to the user via the callback function.

The SOAP messages in general are large. Embedded systems that run the Web server with SOAP, need much more RAM for message buffering and processing. A typical configuration would have:

  • a few MBytes of RAM
  • an SD Card for deploying web service application, for example the Silverlight.

The following extensions have been added to the Web server:

  • the cgi_process_data function has been extended with the code 4 and 5 to allow processing fragmented large POST messages.
  • the Content-Type http header for XML-encoded POST requests is buffered. Function http_get_content_type returns a pointer to the Content-Type string, which was received in the XML POST request.
  • the Content-Type header for the response can be defined by the user in the cgx_content_type function.
  • the http_get_session function is used to identify which Web server session has called a cgi_process_data callback function, if two or more clients have sent XML-POST requests at the same time.
  • the HTTP Caching improves the Web server performance a lot when serving large web service applications.
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