REST是SOAP的轻版本，不添加糖或着色剂。 SOAP和REST的目标都是允许用不同语言编写并使用不同通信协议的信息系统之间进行通信。

SOAP使用API契约来公开它的服务，并定义客户端调用服务的方式，应该发送什么参数以及预期的结果，而REST则不使用API契约，对于客户端来说，要知道存在什么服务以及如何调用它们，应该查看REST API文档(这可以在OpenAPI或Swagger的yml文件中定义)。

其次，SOAP是冗长的，它使用XML发送请求并描述服务、参数和返回的结果。另一方面，REST依赖简单的JSON对象来发送请求和接收结果。JSON易于理解，轻量级，并且在发送请求或接收结果时不会占用太多带宽。

REST api必须是超文本驱动的

Roy Fielding的博客中有一组方法来检查你正在构建的是HTTP API还是REST API:

API designers, please note the following rules before calling your creation a REST API: A REST API should not be dependent on any single communication protocol, though its successful mapping to a given protocol may be dependent on the availability of metadata, choice of methods, etc. In general, any protocol element that uses a URI for identification must allow any URI scheme to be used for the sake of that identification. [Failure here implies that identification is not separated from interaction.] A REST API should not contain any changes to the communication protocols aside from filling-out or fixing the details of underspecified bits of standard protocols, such as HTTP’s PATCH method or Link header field. Workarounds for broken implementations (such as those browsers stupid enough to believe that HTML defines HTTP’s method set) should be defined separately, or at least in appendices, with an expectation that the workaround will eventually be obsolete. [Failure here implies that the resource interfaces are object-specific, not generic.] A REST API should spend almost all of its descriptive effort in defining the media type(s) used for representing resources and driving application state, or in defining extended relation names and/or hypertext-enabled mark-up for existing standard media types. Any effort spent describing what methods to use on what URIs of interest should be entirely defined within the scope of the processing rules for a media type (and, in most cases, already defined by existing media types). [Failure here implies that out-of-band information is driving interaction instead of hypertext.] A REST API must not define fixed resource names or hierarchies (an obvious coupling of client and server). Servers must have the freedom to control their own namespace. Instead, allow servers to instruct clients on how to construct appropriate URIs, such as is done in HTML forms and URI templates, by defining those instructions within media types and link relations. [Failure here implies that clients are assuming a resource structure due to out-of band information, such as a domain-specific standard, which is the data-oriented equivalent to RPC’s functional coupling]. A REST API should never have “typed” resources that are significant to the client. Specification authors may use resource types for describing server implementation behind the interface, but those types must be irrelevant and invisible to the client. The only types that are significant to a client are the current representation’s media type and standardized relation names. [ditto] A REST API should be entered with no prior knowledge beyond the initial URI (bookmark) and set of standardized media types that are appropriate for the intended audience (i.e., expected to be understood by any client that might use the API). From that point on, all application state transitions must be driven by client selection of server-provided choices that are present in the received representations or implied by the user’s manipulation of those representations. The transitions may be determined (or limited by) the client’s knowledge of media types and resource communication mechanisms, both of which may be improved on-the-fly (e.g., code-on-demand). [Failure here implies that out-of-band information is driving interaction instead of hypertext.]

REST强制使用可用的HTTP命令，因为它们应该被使用。

例如，我可以这样做:

GET
http://example.com?method=delete&item=xxx

但是休息时，我会使用“DELETE”请求方法，消除对“method”查询参数的需要

DELETE
http://example.com?item=xxx

REST是SOAP的轻版本，不添加糖或着色剂。 SOAP和REST的目标都是允许用不同语言编写并使用不同通信协议的信息系统之间进行通信。

SOAP使用API契约来公开它的服务，并定义客户端调用服务的方式，应该发送什么参数以及预期的结果，而REST则不使用API契约，对于客户端来说，要知道存在什么服务以及如何调用它们，应该查看REST API文档(这可以在OpenAPI或Swagger的yml文件中定义)。

其次，SOAP是冗长的，它使用XML发送请求并描述服务、参数和返回的结果。另一方面，REST依赖简单的JSON对象来发送请求和接收结果。JSON易于理解，轻量级，并且在发送请求或接收结果时不会占用太多带宽。

不，REST是HTTP应该使用的方式。

今天我们只使用了HTTP协议的一小部分方法——即GET和POST。REST的方法是使用协议的所有方法。

例如，REST规定使用DELETE来删除URI后面的文档(可以是文件、状态等)，而使用HTTP，您可能会滥用GET或POST查询，如…product/?delete_id=22。

不太……

http://en.wikipedia.org/wiki/Representational_State_Transfer

REST was initially described in the context of HTTP, but is not limited to that protocol. RESTful architectures can be based on other Application Layer protocols if they already provide a rich and uniform vocabulary for applications based on the transfer of meaningful representational state. RESTful applications maximise the use of the pre-existing, well-defined interface and other built-in capabilities provided by the chosen network protocol, and minimise the addition of new application-specific features on top of it.

http://www.looselycoupled.com/glossary/SOAP

(简单对象访问协议 web服务消息的标准。 SOAP基于XML定义了一个信封 格式和各种规则 描述它的内容。见过( WSDL和UDDI)作为三者之一 web服务的基础标准， 它是用于 交换web服务，但不是 意思是唯一的;REST的支持者 说它增加了不必要的东西 的复杂性。