如果您请求资源，那么RESTful API在设计上更好。如果您请求一些具有大量参数和复杂方法的复杂数据，而不是简单的CRUD，那么RPC是正确的方法。

我过去一直是REST的忠实粉丝，它在纸上比RPC有很多优势。你可以给客户端提供不同的内容类型、缓存、HTTP状态代码的重用，你可以通过API引导客户端，如果API不是大部分都是自解释的，你可以在API中嵌入文档。

But my experience has been that in practice this doesn't hold up and instead you do a lot of unnecessary work to get everything right. Also the HTTP status codes often don't map to your domain logic exactly and using them in your context often feels a bit forced. But the worst thing about REST in my opinion is that you spend a lot of time to design your resources and the interactions they allow. And whenever you do some major additions to your API you hope you find a good solution to add the new functionality and you didn't design yourself into a corner already.

This often feels like a waste of time to me because most of the time I already have a perfectly fine and obvious idea about how to model an API as a set of remote procedure calls. And if I have gone through all this effort to model my problem inside the constraints of REST the next problem is how to call it from the client? Our programs are based on calling procedures so building a good RPC client library is easy, building a good REST client library not so much and in most cases you will just map back from your REST API on the server to a set of procedures in your client library.

正因为如此，今天对我来说，RPC感觉更简单、更自然。不过，我真正怀念的是一个一致的框架，它可以很容易地编写自描述和可互操作的RPC服务。因此，我创建了自己的项目，尝试新的方法使RPC对我自己更容易，也许其他人也会发现它有用:https://github.com/aheck/reflectrpc

我已经对这个问题进行了一些详细的研究，并认为纯REST的局限性太大，RPC是最好的，尽管我的大多数应用程序都是CRUD应用程序。如果您坚持使用REST，那么您最终将会挠头思考如何轻松地将另一个所需的方法添加到API中以实现某些特殊目的。在许多情况下，使用REST实现这一点的唯一方法是为它创建另一个控制器，这可能会使程序过于复杂。

如果您决定使用RPC，唯一的区别是您显式地将动词指定为URI的一部分，这是清晰的、一致的、bug较少的，而且确实没有麻烦。特别是如果你要创建一个超越简单CRUD的应用程序，RPC是唯一的选择。我对REST的纯粹主义者还有另一个问题:HTTP POST, GET, PUT, DELETE在HTTP中有明确的含义，这些含义被REST颠覆为其他含义，仅仅是因为它们在大多数时间都适用——但不是所有时间都适用。

在编程中，我很久以前就发现，试图用一件事来表示两件事，有时会让你吃不厌。我喜欢能够对几乎每个操作都使用POST，因为它提供了按方法需要发送和接收数据的自由。你不能把整个世界都放进CRUD里。

为什么JSON RPC:

对于REST api，我们必须为可能需要的每个功能/方法定义一个控制器。因此，如果我们想让客户端访问10个方法，我们就必须编写10个控制器来将客户端请求连接到特定的方法。

另一个因素是，即使我们为每个方法/功能使用不同的控制器，客户端也必须记住是使用POST还是GET。这使事情更加复杂。为了发送数据，如果使用POST，则必须设置请求的内容类型。

对于JSONRPC，事情大大简化了，因为大多数JSONRPC服务器操作POST HTTP方法，内容类型始终是application/ JSON。这减轻了在客户端使用正确的HTTP方法和内容设置的负担。

不必为服务器想要向客户端公开的不同方法/功能创建单独的控制器。

为什么休息:

对于服务器希望向客户端公开的不同功能，有不同的url。因此，您可以嵌入这些url。

这些观点大多是有争议的，完全取决于一个人的需要。

最好在REST和JSON-RPC之间选择JSON-RPC，为web应用程序开发一个更容易理解的API。JSON-RPC是首选，因为它对方法调用和通信的映射很容易理解。

选择最合适的方法取决于约束条件或主要目标。例如，只要性能是一个主要特征，就建议使用JSON-RPC(例如，高性能计算)。但是，如果主要目标是不可知，以便提供一个通用的接口供其他人推断，则建议使用REST。如果两个目标都需要实现，建议同时包含两个协议。

The fact which actually splits REST from JSON-RPC is that it trails a series of carefully thought out constraints- confirming architectural flexibility. The constraints take in ensuring that the client as well as server are able to grow independently of each other (changes can be made without messing up with the application of client), the calls are stateless (the state is regarded as hypermedia), a uniform interface is offered for interactions, the API is advanced on a layered system (Hall, 2010). JSON-RPC is rapid and easy to consume, however as mentioned resources as well as parameters are tightly coupled and it is likely to depend on verbs (api/addUser, api/deleteUser) using GET/ POST whereas REST delivers loosely coupled resources (api/users) in a HTTP. REST API depends up on several HTTP methods such as GET, PUT, POST, DELETE, PATCH. REST is slightly tougher for inexperienced developers to implement.

JSON (denoted as JavaScript Object Notation) being a lightweight data-interchange format, is easy for humans to read as well as write. It is hassle free for machines to parse and generate. JSON is a text format which is entirely language independent but practices conventions that are acquainted to programmers of the family of languages, consisting of C#, C, C++, Java, Perl, JavaScript, Python, and numerous others. Such properties make JSON a perfect data-interchange language and a better choice to opt for.

我使用vdata为RPC协议: http://vdata.dekuan.org/

1、PHP和JavaScript都没问题。 2、跨源资源共享(CORS)呼叫仍然正常。