blocks|key|1961838|text|您可以定义RESTful服务--使用HTTPS+(定义上使用TCP/IP+)，并且能够传输任意数量的数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961839|REST相对于SOAP的优点是REST更简单。它可以使用JSON代替更简单的XML。|1961840|它的开销小于SOAP协议。|1961841|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

You can define RESTful services the use HTTPS (which uses TCP/IP by definition) and is capable of transferring any amount of data.

The advantage of REST over SOAP is that REST is simpler. It can use JSON instead of XML which is simpler.

It has less overhead than the SOAP protocol.

blocks|key|747758|text|你就不能在TCP上使用SSL吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|747759|如果你有某种*nix+(我可以猜吗？)它要么是QNX，要么是嵌入式linux，对吗？)通过以太网、USB和RS232，它应该可以开箱即用。保持简单。|747760|32+is是这个任务的大量内存。我会分配2到4MB的内存用于网络和加密(代码%2B数据)。|747761|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Can't you just use SSL over TCP? 

If you have some kind of *nix (may I guess? It's either QNX or embedded linux, right?) it should work pretty much out of the box via Ethernet, USB and RS232. Keep thing simple. 

32mb is plenty of memory for this task. I would allocate between 2 and 4 mb of memory for networking &amp; encryption (code + data).

blocks|key|747818|text|现在还不清楚为什么要将它与SOAP这样的远程过程调用协议联系起来。还有其他你没有提到的要求吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|747819|不过，通常情况下，使用普通的基于web的服务很容易处理这类事情。您可以获得用C；参见维基百科的这篇文章编写的非常轻量级的http处理器，以比较其中的一些处理器。然后REST接口就可以正常工作了。还有一些网络接口也将USB视为TCP连接。|offset|length|747820|如果您必须能够运行RS232，您可能需要在其他地方查找；在这种情况下，类似sftp的东西可能会做得更好。或者编写一个简单的应用层协议，可以在加密的连接上运行。|747821|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Tiny_web_servers^0|0|14|B|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

It's not real clear why you want to tie this to a remote-procedure-call protocol like SOAP. Are there other requirements you aren't mentioning?

In general, though, this sort of thing is handled very easily using normal web-based services. You can get very lightweight http processors written in C; <a href="http://en.wikipedia.org/wiki/Tiny_web_servers" rel="nofollow noreferrer">see this Wikipedia article</a> for comparisons of a number of them. Then a REST interface will work fine. There are network interfaces that treat USB as a TCP connection, as well.

If you must be able to run over RS232, you might want to look elsewhere; in that case, something like sftp might do better. Or write a simple application-layer protocol that you can run over an encrypted connection.

blocks|key|1961986|text|如果您要使用RS232连接您的应用程序，我假设您将使用PPP将设备连接到internet。然而，您提议传输的数据量有点令人担忧。大多数RS232连接限制在115200波特，忽略TCP/IP/PPP帧所需的开销将产生每秒最多11000字节的传输速率。这意味着，它将需要至少2800秒或46分钟，以作出任何转移，你的意愿。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1961987|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are going to connect your application using RS232, I assume that you will be using PPP to connect the device to the internet. The amount of data that you are proposing to transfer is somewhat worrisome, however. Most RS232 connections are limited to 115200 baud which, ignoring the overhead required for TCP/IP/PPP framing is going to yield a transfer rate of at most 11,000 bytes per second. This implies that it will take a minimum of approximately 2800 seconds or 46 minutes to make whatever transfer that you intend.

We have an embedded device that needs to interact with an enterprise software system. 

The enterprise system currently uses many different mechanisms for communication between its components: ODBC, RPC, proprietary protocol over TCP/IP, and is moving to .Net-implmented web services.

The embedded device runs a flavor of *nix, so we're looking at what the best interaction mechanism is.

The requirements for the communication are:
<li> Must run over TCP/IP.
<li> Must also run over RS-232 or USB.
<li> Must be secure (e.g. HTTPS or SSL).
<li> Must be capable of transferring ~32MB of data.
 
 

<a href="http://www.cs.fsu.edu/~engelen/soap.html" rel="nofollow noreferrer">Our current best option is gSOAP</a>.

Does anyone out there in SO-land have any other suggestions?

Edit: Steven's answer gave me the most new pointers. Thanks to all!

How to implement web services on an embedded device?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我们有一个嵌入式设备，需要与企业软件系统交互。企业系统目前使用许多不同的机制在其组件之间进行通信: ODBC、RPC、TCP/IP上的专有协议，并且正在转向..Net内嵌的web服务。嵌入式设备运行的是*nix，所以我们正在研究最佳的交互机制是什么。来文的要求是：必须在TCP/IP上运行。还必须在RS-232或USB上...

问如何在嵌入式设备上实现web服务？
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