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What protocol is used for message transmission in SOAP-based web services?

sobes.tech AI

Answer from AI

In SOAP-based web services, the protocol used for message transmission is HTTP or HTTPS as the transport protocol. The SOAP (Simple Object Access Protocol) itself defines the format of XML messages that are transmitted over HTTP.

That is, SOAP messages are encapsulated in the body of HTTP requests and responses. This allows the use of standard web technologies for exchanging structured messages between a client and a server.

An example of an HTTP request with a SOAP message:

POST /Service HTTP/1.1
Host: example.com
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "action"

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header/>
   <soapenv:Body>
      <!-- SOAP message body -->
   </soapenv:Body>
</soapenv:Envelope>

Thus, HTTP(S) is the transport protocol for transmitting SOAP messages.

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