pub_iva2k_ethsntp - Example of HTTPServer with additional features: …

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Example of HTTPServer with additional features: * SNTPClient, DST rules * Link status indication * Local or SDCard-based WebServer * RPC-able class * Static and Dynamic HTML page

Dependencies: mbed

lwip/HTTPServer/HTTPFS.h@2:360fda42fefd, 2010-01-12 (annotated)

Committer:: iva2k
Date:: Tue Jan 12 07:41:55 2010 +0000
Revision:: 2:360fda42fefd
Parent:: 0:886e4b3119ad

Who changed what in which revision?

User	Revision	Line number	New contents of line
iva2k	0:886e4b3119ad	1	#ifndef HTTPFILESYSTEM_H
iva2k	0:886e4b3119ad	2	#define HTTPFILESYSTEM_H
iva2k	0:886e4b3119ad	3
iva2k	0:886e4b3119ad	4	#include "mbed.h"
iva2k	0:886e4b3119ad	5
iva2k	0:886e4b3119ad	6	#include "HTTPServer.h"
iva2k	0:886e4b3119ad	7
iva2k	0:886e4b3119ad	8	#define HTTP_BUFFER_SIZE 700
iva2k	0:886e4b3119ad	9	#define FILENAMELANGTH 100
iva2k	0:886e4b3119ad	10
iva2k	0:886e4b3119ad	11	/**
iva2k	0:886e4b3119ad	12	* This class will store the data which are required for an request.
iva2k	0:886e4b3119ad	13	* We are not in every case able to return all data at once, that means we have to store
iva2k	0:886e4b3119ad	14	* the actual level of transmission.
iva2k	0:886e4b3119ad	15	*/
iva2k	0:886e4b3119ad	16	class HTTPFileSystemData : public HTTPData {
iva2k	0:886e4b3119ad	17	public:
iva2k	0:886e4b3119ad	18	int fleft;
iva2k	0:886e4b3119ad	19	int bleft;
iva2k	0:886e4b3119ad	20	int offset;
iva2k	0:886e4b3119ad	21	FILE *file;
iva2k	0:886e4b3119ad	22	char buffer[HTTP_BUFFER_SIZE];
iva2k	0:886e4b3119ad	23
iva2k	0:886e4b3119ad	24	virtual ~HTTPFileSystemData() {
iva2k	0:886e4b3119ad	25	if(file) {
iva2k	0:886e4b3119ad	26	fclose(file);
iva2k	0:886e4b3119ad	27	file = 0;
iva2k	0:886e4b3119ad	28	}
iva2k	0:886e4b3119ad	29	}
iva2k	0:886e4b3119ad	30	};
iva2k	0:886e4b3119ad	31
iva2k	0:886e4b3119ad	32	/**
iva2k	0:886e4b3119ad	33	* This class will deliver files form the virtual file system.
iva2k	0:886e4b3119ad	34	* Furthermore it is a simple example how to implement an HTTPHandler for big data requests.
iva2k	0:886e4b3119ad	35	*/
iva2k	0:886e4b3119ad	36	class HTTPFileSystemHandler : public HTTPHandler {
iva2k	0:886e4b3119ad	37	public:
iva2k	0:886e4b3119ad	38	/**
iva2k	0:886e4b3119ad	39	* Create a new HTTPFileSzstemHandler.
iva2k	0:886e4b3119ad	40	* @param prefix The Prefix is the URL Proefix in witch the Handler will work.
iva2k	0:886e4b3119ad	41	* @param dir The Prefix will be directly mappt on the dir.
iva2k	0:886e4b3119ad	42	*/
iva2k	0:886e4b3119ad	43	HTTPFileSystemHandler(const char path, const char dir) : HTTPHandler(path), _dir(dir) {}
iva2k	0:886e4b3119ad	44	HTTPFileSystemHandler(HTTPServer server, const char path, const char *dir) : HTTPHandler(path), _dir(dir) { server->addHandler(this); }
iva2k	0:886e4b3119ad	45
iva2k	0:886e4b3119ad	46	private:
iva2k	0:886e4b3119ad	47	/**
iva2k	0:886e4b3119ad	48	* Check if a requested file exists.
iva2k	0:886e4b3119ad	49	* If it exists open it and store the data back in the HTTPConnection.
iva2k	0:886e4b3119ad	50	* We would not store connection specific data into the Handler.
iva2k	0:886e4b3119ad	51	* If the file exists and we cann serve a page return HTTP_OK else HTTP_NotFound.
iva2k	0:886e4b3119ad	52	* @param con The Connection which will be handled.
iva2k	0:886e4b3119ad	53	*/
iva2k	0:886e4b3119ad	54	virtual HTTPStatus init(HTTPConnection *con) const {
iva2k	0:886e4b3119ad	55	char filename[FILENAMELANGTH];
iva2k	0:886e4b3119ad	56	HTTPFileSystemData *data = new HTTPFileSystemData();
iva2k	0:886e4b3119ad	57	snprintf(filename, FILENAMELANGTH, "%s%s\0", _dir, con->getURL() + strlen(_prefix));
iva2k	0:886e4b3119ad	58	data->file = fopen(filename, "r");
iva2k	0:886e4b3119ad	59	if(!data->file) {
iva2k	0:886e4b3119ad	60	delete data;
iva2k	0:886e4b3119ad	61	return HTTP_NotFound;
iva2k	0:886e4b3119ad	62	}
iva2k	0:886e4b3119ad	63	data->fleft = fleft(data->file);
iva2k	0:886e4b3119ad	64	data->bleft = 0;
iva2k	0:886e4b3119ad	65	data->offset = 0;
iva2k	0:886e4b3119ad	66
iva2k	0:886e4b3119ad	67	con->data = data;
iva2k	0:886e4b3119ad	68	con->setLength(data->fleft);
iva2k	0:886e4b3119ad	69	loadFromFile(con);
iva2k	0:886e4b3119ad	70	return HTTP_OK;
iva2k	0:886e4b3119ad	71	}
iva2k	0:886e4b3119ad	72
iva2k	0:886e4b3119ad	73	/**
iva2k	0:886e4b3119ad	74	* Send the maximum available data chunk to the Client.
iva2k	0:886e4b3119ad	75	* If it is the last chunk close connection by returning HTTP_SuccessEnded
iva2k	0:886e4b3119ad	76	* @param con The connection to handle
iva2k	0:886e4b3119ad	77	* @param maximum The maximal available sendbuffer size.
iva2k	0:886e4b3119ad	78	* @return HTTP_Success when mor data is available or HTTP_SuccessEnded when the file is complete.
iva2k	0:886e4b3119ad	79	*/
iva2k	0:886e4b3119ad	80	virtual HTTPHandle send(HTTPConnection *con, int maximum) const {
iva2k	0:886e4b3119ad	81	HTTPFileSystemData data = static_cast<HTTPFileSystemData >(con->data);
iva2k	0:886e4b3119ad	82	err_t err;
iva2k	0:886e4b3119ad	83	u16_t len = min(data->bleft, maximum);
iva2k	0:886e4b3119ad	84	// printf("Send File\n");
iva2k	0:886e4b3119ad	85	if(len) {
iva2k	0:886e4b3119ad	86	do {
iva2k	0:886e4b3119ad	87	err = con->write(
iva2k	0:886e4b3119ad	88	&data->buffer[data->offset], len, (((!data->fleft)&&(data->bleft==len))?
iva2k	0:886e4b3119ad	89	(TCP_WRITE_FLAG_COPY \| TCP_WRITE_FLAG_MORE) : (TCP_WRITE_FLAG_COPY)));
iva2k	0:886e4b3119ad	90	if(err == ERR_MEM) {
iva2k	0:886e4b3119ad	91	len /= 2;
iva2k	0:886e4b3119ad	92	}
iva2k	0:886e4b3119ad	93	} while (err == ERR_MEM && len > 1);
iva2k	0:886e4b3119ad	94
iva2k	0:886e4b3119ad	95	if(err == ERR_OK) {
iva2k	0:886e4b3119ad	96	data->offset += len;
iva2k	0:886e4b3119ad	97	data->bleft -= len;
iva2k	0:886e4b3119ad	98	}
iva2k	0:886e4b3119ad	99	}
iva2k	0:886e4b3119ad	100	return loadFromFile(con);
iva2k	0:886e4b3119ad	101	}
iva2k	0:886e4b3119ad	102
iva2k	0:886e4b3119ad	103	/**
iva2k	0:886e4b3119ad	104	* Returns the left size of a file.
iva2k	0:886e4b3119ad	105	* @param fd The filehandler of which we want to know the filesize.
iva2k	0:886e4b3119ad	106	* @return The filesize of fd.
iva2k	0:886e4b3119ad	107	*/
iva2k	0:886e4b3119ad	108	long fleft(FILE *fd) const {
iva2k	0:886e4b3119ad	109	long len, cur;
iva2k	0:886e4b3119ad	110	cur = ftell(fd);
iva2k	0:886e4b3119ad	111	fseek(fd, 0, SEEK_END);
iva2k	0:886e4b3119ad	112	len = ftell(fd);
iva2k	0:886e4b3119ad	113	fseek(fd, cur, SEEK_SET);
iva2k	0:886e4b3119ad	114	return len;
iva2k	0:886e4b3119ad	115	}
iva2k	0:886e4b3119ad	116
iva2k	0:886e4b3119ad	117	/**
iva2k	0:886e4b3119ad	118	* Fill the buffer if the buffer is empty.
iva2k	0:886e4b3119ad	119	* If the file is complete close the filehandler and return HTTP_SuccessEnded.
iva2k	0:886e4b3119ad	120	*/
iva2k	0:886e4b3119ad	121	HTTPHandle loadFromFile(HTTPConnection *con) const {
iva2k	0:886e4b3119ad	122	HTTPFileSystemData data = static_cast<HTTPFileSystemData >(con->data);
iva2k	0:886e4b3119ad	123	if(!data->bleft) {
iva2k	0:886e4b3119ad	124	if(data->fleft) {
iva2k	0:886e4b3119ad	125	int len = fread(&data->buffer[0], sizeof(char), HTTP_BUFFER_SIZE, data->file);
iva2k	0:886e4b3119ad	126	data->fleft -= len;
iva2k	0:886e4b3119ad	127	data->bleft = len;
iva2k	0:886e4b3119ad	128	data->offset = 0;
iva2k	0:886e4b3119ad	129	} else {
iva2k	0:886e4b3119ad	130	if(data->file) {
iva2k	0:886e4b3119ad	131	fclose(data->file);
iva2k	0:886e4b3119ad	132	data->file = 0;
iva2k	0:886e4b3119ad	133	}
iva2k	0:886e4b3119ad	134	return HTTP_SuccessEnded;
iva2k	0:886e4b3119ad	135	}
iva2k	0:886e4b3119ad	136	}
iva2k	0:886e4b3119ad	137	return HTTP_Success;
iva2k	0:886e4b3119ad	138	}
iva2k	0:886e4b3119ad	139
iva2k	0:886e4b3119ad	140	/** The Directory which will replace the prefix of the URL */
iva2k	0:886e4b3119ad	141	const char *_dir;
iva2k	0:886e4b3119ad	142	};
iva2k	0:886e4b3119ad	143
iva2k	0:886e4b3119ad	144	#endif

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Jan 2010
Imports:	79
Forks:	0
Commits:	3
Dependents:	0
Dependencies:	1
Followers:	4

lwip/HTTPServer/HTTPFS.h@2:360fda42fefd, 2010-01-12 (annotated)

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