Simple Object Access Protocol (SOAP)
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SOAP is a messaging protocol for accessing web services and communicating between systems. It uses XML messages transmitted via HTTP and has an envelope, header, and body structure. SOAP aims to be simple, extensible, neutral to transport protocols and programming languages. The document then describes SOAP architecture, message format, messaging models, security issues, advantages, disadvantages, and provides an overview of WSDL and an example SOAP implementation in PHP.
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SOAP is a standard protocol for exchanging XML-based messages over computer networks, normally using HTTP/HTTPS. It allows applications to communicate in a decentralized and distributed environment. Key points:
- SOAP specifies how to encode an HTTP request and response so it can convey a message. This allows different systems to communicate even if they use different technologies.
- A SOAP message contains an envelope specifying the message structure and a body containing the message payload. It may also contain a header for things like authentication.
- SOAP is language and platform independent - it can be used by any programming language or system that can produce and process XML. Major vendors provide SOAP integration and tools.
SOAP by luv
A web service allows machine-to-machine communication over a network through a standardized interface described in WSDL and using SOAP messages over HTTP. SOAP defines an XML format for structured messaging to allow applications to communicate, making it platform and language independent. While SOAP enables interoperability, it can be slower than other APIs due to its extensive use of XML.
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This document provides an overview of web services and related technologies including:
- Web services allow for integration and communication between organizations through standardized XML messaging and protocols.
- A service-oriented architecture uses services that can be discovered and invoked over the web.
- Key technologies that enable web services are XML, XML Schema, SOAP, WSDL, and UDDI. These provide standards for messaging, data description, service description and discovery.
Developmeant and deployment of webservice
The document discusses web services, including their definition, key elements, and how they are developed and deployed. Specifically, it defines web services as software systems designed to support interoperable machine-to-machine interactions over a network. It describes the core standards and protocols involved - SOAP for messaging, WSDL for interface description, and UDDI as a registry. The document also outlines the architecture of web services, including how clients communicate with services via SOAP, and how services are described and registered using WSDL and UDDI. Finally, it briefly discusses tools for deploying web services on servers like IIS and WebSphere.
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Simple Object Access Protocol (SOAP)
- 1. Simple Object Access Protocol (SOAP) Presented by Mehul Kumar
- 2. What we are going to Discuss? • Introduction • Design Goals • Architecture • SOAP Message Format • Messaging Models • Security & Issues • Advantages & Disadvantages • WSDL Overview • Implementation Example
- 3. What is SOAP? • Simple Object Access Protocol • Messaging Protocol • Protocol to Access Web Services • Based on XML • Developed by IBM, Microsoft, Lotus, and others
- 4. Example
- 5. Design Goals of SOAP • Simplicity • Extensibility • Neutrality (Protocols) • Independence (Programming Language)
- 6. In Brief • SOAP is a way for a program running in one operating system to communicate with a program running in either the same or a different operating system, using HTTP (or any other transport protocol) and XML.
- 8. SOAP Message Format 1. Envelope - What is in the message & who should deal with it. 2. Header (Optional) - Generic Container for Control Information. Can contain any number of elements. 3. Body - Message Payload
- 9. Format - SOAP Envelope Code <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Header> <!-- optional --> <!-- header blocks go here... --> </soap:Header> <soap:Body> <!-- payload or Fault element goes here... --> </soap:Body> </soap:Envelope>
- 10. Format - SOAP Header Code <soap:Header> <!-- security credentials --> <s:credentials xmlns:s="urn:examples-org:security"> <username>dave</username> <password>evad</password> </s:credentials> </soap:Header>
- 11. Format - SOAP Body Code <soap:Body> <x:TransferFunds xmlns:x="urn:examples- org:banking"> <from>22-342439</from> <to>98-283843</to> <amount>100.00</amount> </x:TransferFunds> </soap:Body>
- 12. SOAP Messaging Models • Request/Response • One Way • Multicast
- 13. SOAP Security & Issues • Does not define encryption for XML Web Services. • Left up to the implementer. Issues • Encryption places dependency on transport protocol • Cost of Encryption
- 14. SOAP Advantages • Simplicity • Portability • Firewall Friendly • Use of Open Standards • Interoperatibility
- 15. SOAP Disadvantages • Too much reliance on HTTP • Statelessness • Serialized by Value and not by Reference
- 16. What is WSDL? • Web Service Description Language • Pronounced as 'wiz-dull' • Provides Metadata for SOAP Service • Follow Specific Structure
- 17. WSDL Structure <definitions> <types> ........ </types> <!--Type of Data--> <message> <part></part> </message> <!--Data Elements--> <portType> ....... </portType> <!--Operations--> <binding> .... </binding> <!--Protocol & Data Format for a Port--> <service> .... </service> <!--URI & Details--> </definitions>
- 18. Implementation of SOAP Let's see an example using PHP
- 19. Conclusion • Fallen-out of Favor due to new public APIs • Commonly used for B2B Applications • Independent of Programming Languages • XML Based