241:. The practical difference is just that XML-RPC is much more structured, which means common library code can be used to implement clients and servers and there is less design and documentation work for a specific application protocol. One salient technical difference between typical RESTful protocols and XML-RPC is that many RESTful protocols use the HTTP URI for parameter information, whereas with XML-RPC, the URI just identifies the server.
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Recent critics (from 2010 and onwards) of XML-RPC argue that RPC calls can be made with plain XML, and that XML-RPC does not add any value over XML. Both XML-RPC and XML require an application-level data model, such as which field names are defined in the XML schema or the parameter names in XML-RPC.
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In XML-RPC, a client performs an RPC by sending an HTTP request to a server that implements XML-RPC and receives the HTTP response. A call can have multiple parameters and one result. The protocol defines a few data types for the parameters and result. Some of these data types are complex, i.e.
163:, with Microsoft seeing the protocol as an essential part of scaling up its efforts in business-to-business e-commerce. As new functionality was introduced, the standard evolved into what is now
173:
XML-RPC's idea of a human-readable-and-writable, script-parsable standard for HTTP-based requests and responses has also been implemented in competing specifications such as
Allaire's
200:(RPC) was patented by Phillip Merrick, Stewart Allen, and Joseph Lapp in April 2006, claiming benefit to a provisional application filed in March 1998. The patent was assigned to
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Furthermore, XML-RPC uses about 4 times the number of bytes compared to plain XML to encode the same objects, which is itself verbose compared to
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Not to be confused with the use of XML for RPC, independently of the specific protocol. This article is about the protocol named "XML-RPC".
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The parameters/result structure and the set of data types are meant to mirror those used in common programming languages.
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UserLand supported XML-RPC from version 5.1 of its
Frontier web content management system, released in June 1998.
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objects in XML syntax and transporting them via HTTP also existed in DataChannel's WebBroker technology.
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of clients for authorization purposes can be achieved using popular HTTP security methods.
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nested. For example, you can have a parameter that is an array of five integers.
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are converted into their XML equivalents with example values shown below:
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956:"Exploring XML-RPC: DCOM? CORBA? RMI? Why Not Just XML-RPC?"
1101:"An open poll on the merits of XmlRpc versus alternatives"
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Simon St. Laurent, Joe
Johnston, Edd Dumbill. (June 2001)
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925:"UserLand releases Frontier 5.1, drops freeware model"
237:(documents) are transferred, XML-RPC is designed to
627:An example of a typical XML-RPC response would be:
230:can be used for identification and authentication.
52:. Unsourced material may be challenged and removed.
585:An example of a typical XML-RPC request would be:
1075:"What is the benefit of XML-RPC over plain XML?"
1016:Vizard, Michael; Walsh, Jeff (29 June 1998).
8:
987:"W3C gives a nod to DataChannel's WebBroker"
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151:The XML-RPC protocol was created in 1998 by
993:. Vol. 20, no. 21. Archived from
233:In comparison to RESTful protocols, where
112:Learn how and when to remove this message
780:Comparison of data serialization formats
261:
208:. The patent expired on March 23, 2019.
811:
1047:Merrick; et al. (11 April 2006).
820:Programming Web Services with XML-RPC.
667:<?xml version="1.0"?>
632:<?xml version="1.0"?>
590:<?xml version="1.0"?>
7:
1103:. intertwingly.net. 22 November 2006
894:"Microsoft spearheads protocol push"
50:adding citations to reliable sources
858:Rupley, Sebastian (30 June 1999).
662:A typical XML-RPC fault would be:
485:String of characters. Must follow
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179:Web Interface Definition Language
1124:"If you have REST, why XML-RPC?"
26:
1126:. joncanady.com. Archived from
37:needs additional citations for
1122:Jon Canady (14 January 2010).
1:
716:</string></value>
648:</string></value>
299:</string></value>
175:Web Distributed Data Exchange
923:Walsh, Jeff (29 June 1998).
892:Walsh, Jeff (10 July 1999).
334:eW91IGNhbid0IHJlYWQgdGhpcyE=
985:Walsh, Jeff (25 May 1998).
712:<value><string>
644:<value><string>
321:of values, storing no keys
295:<value><string>
228:Basic access authentication
196:The generic use of XML for
181:(WIDL). Prior art wrapping
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954:Udell, Jon (7 June 1999).
696:</int></value>
143:as a transport mechanism.
18:
834:"A Brief History of SOAP"
832:Box, Don (1 April 2001).
613:</i4></value>
537:</i4></value>
517:</i4></value>
384:</dateTime.iso8601>
306:</i4></value>
292:</i4></value>
16:Data serialization format
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609:<value><i4>
533:<value><i4>
513:<value><i4>
369:logical value (0 or 1)
302:<value><i4>
288:<value><i4>
247:is similar to XML-RPC.
177:(WDDX) and webMethod's
775:Component technologies
670:<methodResponse>
635:<methodResponse>
418:floating point number
1187:Remote procedure call
1049:"US Patent 7,028,312"
598:examples.getStateName
345:-encoded binary data
198:remote procedure call
129:remote procedure call
1028:on 16 September 1999
997:on 10 September 1999
935:on 15 September 1999
904:on 14 September 1999
46:improve this article
1172:XML-based standards
622:</methodCall>
600:</methodName>
1182:Internet protocols
1081:. 9 September 2009
1055:on 3 December 2011
770:Ajax (programming)
714:Toomanyparameters.
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860:"XML's Next Step"
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57:Find sources:
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35:This article
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1177:Web services
1132:. Retrieved
1128:the original
1117:
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1083:. Retrieved
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1059:18 September
1057:. Retrieved
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506:<name>
487:XML encoding
480:Helloworld!
475:
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433:</int>
285:<data>
271:Description
268:Tag Example
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239:call methods
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102:October 2016
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44:Please help
39:verification
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1001:17 November
970:17 November
939:17 November
908:17 November
874:17 November
864:PC Magazine
795:Web service
756:Weblogs.com
707:faultString
646:SouthDakota
469:Helloworld!
447:</i4>
429:<int>
135:which uses
1166:Categories
1032:8 December
843:27 October
806:References
443:<i4>
374:date/time
251:Data types
202:webMethods
153:Dave Winer
72:newspapers
1022:Infoworld
991:Infoworld
929:InfoWorld
898:Infoworld
737:Criticism
687:faultCode
573:extension
257:datatypes
161:Microsoft
61:"XML-RPC"
838:O'Reilly
790:JSON-RPC
763:Pingback
750:See also
581:Examples
423:integer
392:ISO 8601
350:boolean
245:JSON-RPC
191:Java RMI
133:protocol
1134:7 April
1107:7 April
1085:7 April
494:struct
461:string
455:integer
399:double
394:format
367:Boolean
326:base64
255:Common
147:History
125:XML-RPC
86:scholar
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343:Base64
276:array
189:, and
131:(RPC)
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265:Name
212:Usage
187:CORBA
127:is a
93:JSTOR
79:books
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1061:2008
1034:2015
1003:2015
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960:Byte
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800:gRPC
785:OPML
744:JSON
556:nil
290:1404
165:SOAP
159:and
141:HTTP
65:news
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