From 0ab4f5c276dee2bee33e245ec3dcac3239ae15ad Mon Sep 17 00:00:00 2001 From: Ryan Date: Thu, 16 Apr 2009 11:36:39 +0200 Subject: [PATCH] Remove docs. API is changing too quickly for me to keep up with. I will recreate them as things start to stablize. --- spec/index.html | 355 ------------------------------------------------- spec/specification.css | 217 ------------------------------ 2 files changed, 572 deletions(-) delete mode 100644 spec/index.html delete mode 100644 spec/specification.css diff --git a/spec/index.html b/spec/index.html deleted file mode 100644 index a75e252..0000000 --- a/spec/index.html +++ /dev/null @@ -1,355 +0,0 @@ - - - - Node API - - - - -
- - -

Node API

- -

Draft

- -
-
This version: - -
http://tinyclouds.org/node - -
- -

© Copyright 2009 Ryan Dahl

- -

You are granted a license to use, reproduce and create - derivative works of this document.

-
- -
- -

Abstract

- -

This specification defines a javascript API for creating - servers and clients based around an event loop. It is provided to document - Node's interface and provide a specification for similar efforts. - -

Table of contents

- - - - - -
- -

1 Introduction

- -

This specification defines an API for creating evented servers and - clients in javascript. It can be considered documentation for the Node - project and will be versioned with that software. However, in places the - API is only a specification and does not reflect Node's - behavior—there I will try to note the difference. - -

Unless otherwise noted, a function is non-blocking. Non-blocking means - that program execution will continue without waiting for an I/O event - (be that network or device). - - -

1.1 The event loop

- -

The program is run event loop. There are no concurrent - operations. As long as there are pending events the program will continue - running. If however there arn't any pending callbacks waiting for - something to happen, the program will exit. - -

1.2 Execution context

- -

Global data is shared between callbacks. - -

- spawn() to start a new context/event loop? - -

2 HTTP Server

- 
[Constructor(in String host, in String port, in Function
-  onrequest)]
-interface HTTPServer  {
-  readonly attribute String host;
-  readonly attribute String port;
-
-  // networking                
-    attribute Function onrequest;
-  void close(); // yet not implemented
-};
- -
-
HTTPServer(host, port, onrequest)
-
- -

error handling?

- - -

2.1 Request object

- 
interface HTTPRequest  {
-  readonly attribute String path;
-  readonly attribute String uri;
-  readonly attribute String query_string;
-  readonly attribute String fragment;
-  readonly attribute String method;
-  readonly attribute String http_version;
-  readonly attribute Array headers;
-
-  // ready state
-  const unsigned short HEADERS_RECEIVED = 0;
-  const unsigned short LOADING = 1;
-  const unsigned short DONE = 2;
-  readonly attribute long readyState;
-
-    attribute Function onbody;
-
-  void respondHeader (in short status, in Array headers);
-  void respondBody (in ByteArray data);
-};
- -

issue: client ip address

- -

A request object is what is passed to HTTPServer.onrequest. - it represents a single HTTP request. Clients might preform HTTP - pipelining (Keep-Alive) and send multiple requests per TCP - connection—this does not affect this interface. - -

If any error is encountered either with the request or while using the - two response methods the connection to client immediately terminated. - -

-
respondHeader(status, headers)
-
-

This method sends the response status line and headers. - This method may only be called once. After the first, calling it - will raise an INVALID_STATE_ERR exception. - -

The status argument is an integer HTTP status response code as - defined in 6.1 of RFC 2616. - -

The header argument is an Array of - tuples (a two-element Array). For example - - 

[["Content-Type", "text/plain"], ["Content-Length", 10]]
- -

This array determines the response headers. If the - header parameter includes elements that are not tuples it - raises SYNTAX_ERR. If the elements of the tuples do not - respond to toString() the method raises - SYNTAX_ERR. - -

Besides the author response headers interpreters should not - include additional response headers. This ensures that authors - have a reasonably predictable API. - -

If the client connection was closed for any reason, calling - respondHeader() will raise a NETWORK_ERR - exception. -

- -
respondBody(data)
-
-

This method must be called after respondHeader(). If - respondHeader() has not been called it will raise an - INVALID_STATE_ERR exception. - -

When given a String or ByteArray the - interpreter will send the data. - -

Given a null argument signals end-of-response. - -

The author must call respondBody(null) - for each response, even if the response has no body.

- -

After the end-of-response, calling respondHeader() or - respondBody() will raise an INVALID_STATE_ERR exception. - -

If the client connection was closed for any reason, calling - respondBody() will raise a NETWORK_ERR - exception. - -

- - -
- -

3 TCP Client

- 
[Constructor(in String host, in String port)]
-interface TCPClient  {
-  readonly attribute String host;
-  readonly attribute String port;
-
-  // ready state
-  const unsigned short CONNECTING = 0;
-  const unsigned short OPEN = 1;
-  const unsigned short CLOSED = 2;
-  readonly attribute long readyState;
-
-  // networking                
-    attribute Function onopen;
-    attribute Function onread;
-    attribute Function onclose;
-  void write(in ByteArray data);
-  void disconnect();           
-};
- -
-
TCPClient(host, port)
-
-

When a TCPClient object is - created, the the interpreter must try to establish a connection. - If the host parameter is not an IP address it - will be looked up using the DNS. -

- -
write(data)
-
-

Transmits data using the connection. If the connection is not yet - established or the connection is closed, calling write() - will raise an INVALID_STATE_ERR exception.

- -

write(null) sends an EOF to the peer. Further writing - is disabled. However the onread callback may still - be executed. -

- -
disconnect()
-
-

Closes the connection, if it is open. If the connection is already - closed, it does nothing. Closing the connection causes a - onclose callback to be made and the - readyState attribute's value to - change to CLOSED. - Note that a connection might not be closed instantaniously. In the - case of secure connection some "goodbye" transmission might be sent. -

-
- -

The readyState attribute - represents the state of the connection. When the object is created it must - be set to CONNECTING. - -

Once a connection is established, the - readyState attribute's value must be changed to - OPEN, and the onopen callback will be made. - -

When data is received, the onread callback - will be made with a single parameter: a ByteArray containing a - chunk of data. The author does not have the ability to control how much data - is received nor the ability to stop the input besides disconnecting. - - - -

When the connection is closed, the readyState -attribute's value must be changed to CLOSED, and the onclose callback -will be made. - - -

4 Timers

- - -

Timers allow one to schedule an event at a later date. - There are four globally exposed functions - setTimeout, - clearTimeout, - setInterval, and - clearInterval. - These functions work similarly - as in the browser except that - the timerID and intervalID do not necessarily have - type long but are rather opaque objects. - -

-
setTimeout(function, milliseconds)
-
-

This method calls the function once after a specified number of - milliseconds elapses, until canceled by a call to clearTimeout. - The methods returns a timerID which may be used in a - subsequent call to clearTimeout to cancel the callback. -

- - -
setInterval(function, milliseconds)
-
-

This method calls the function every time a specified number of - milliseconds elapses, until canceled by a call to clearInterval. - The methods returns a intervalID which may be used in a - subsequent call to clearInterval to cancel the interval. -

- -
clearTimeout(timerID)
-
-

Cancels a timeout that was set with the setTimeout - method. -

- - -
clearInterval(intervalID)
-
-

Cancels an interval that was set with the setInterval method. -

- -
- -

5 Blocking Functions

- -

Node includes a number of blocking functions in its API. Some of these - will be removed in the future as the software improves. - -

-
log(string)
-
-

This function outputs the string to the stadard output device - (usually the console). - Its speed is dependent on where stdout is piped to. -

- - -
blockingFileRead(filename)
-
-

This method opens a file from the file system and returns its - contents as a ByteArray. This function can be extremely - expensive depending on the response time of the file system. It should - only be used in start up. -

- -
- - - -

References

- - -
- -
[RFC2616] - -
Hypertext Transfer - Protocol -- HTTP/1.1, R. Fielding, J. Gettys, J. Mogul, - H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee, editors. 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