UDPtest - Some quick code to use UDP-only (no TCP) with mBe…

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Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

HTTPServer/HTTPFS.h@0:a548a085de55, 2010-03-14 (annotated)

Committer:: pehrhovey
Date:: Sun Mar 14 00:54:12 2010 +0000
Revision:: 0:a548a085de55

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User	Revision	Line number	New contents of line
pehrhovey	0:a548a085de55	1	#ifndef HTTPFILESYSTEM_H
pehrhovey	0:a548a085de55	2	#define HTTPFILESYSTEM_H
pehrhovey	0:a548a085de55	3
pehrhovey	0:a548a085de55	4	#include "mbed.h"
pehrhovey	0:a548a085de55	5
pehrhovey	0:a548a085de55	6	#include "HTTPServer.h"
pehrhovey	0:a548a085de55	7
pehrhovey	0:a548a085de55	8	#define HTTP_BUFFER_SIZE 700
pehrhovey	0:a548a085de55	9	#define FILENAMELANGTH 100
pehrhovey	0:a548a085de55	10
pehrhovey	0:a548a085de55	11	/**
pehrhovey	0:a548a085de55	12	* This class will store the data which are required for an request.
pehrhovey	0:a548a085de55	13	* We are not in every case able to return all data at once, that means we have to store
pehrhovey	0:a548a085de55	14	* the actual level of transmission.
pehrhovey	0:a548a085de55	15	*/
pehrhovey	0:a548a085de55	16	class HTTPFileSystemData : public HTTPData {
pehrhovey	0:a548a085de55	17	public:
pehrhovey	0:a548a085de55	18	int fleft;
pehrhovey	0:a548a085de55	19	int bleft;
pehrhovey	0:a548a085de55	20	int offset;
pehrhovey	0:a548a085de55	21	FILE *file;
pehrhovey	0:a548a085de55	22	char buffer[HTTP_BUFFER_SIZE];
pehrhovey	0:a548a085de55	23
pehrhovey	0:a548a085de55	24	virtual ~HTTPFileSystemData() {
pehrhovey	0:a548a085de55	25	if(file) {
pehrhovey	0:a548a085de55	26	fclose(file);
pehrhovey	0:a548a085de55	27	file = 0;
pehrhovey	0:a548a085de55	28	}
pehrhovey	0:a548a085de55	29	}
pehrhovey	0:a548a085de55	30	};
pehrhovey	0:a548a085de55	31
pehrhovey	0:a548a085de55	32	/**
pehrhovey	0:a548a085de55	33	* This class will deliver files form the virtual file system.
pehrhovey	0:a548a085de55	34	* Furthermore it is a simple example how to implement an HTTPHandler for big data requests.
pehrhovey	0:a548a085de55	35	*/
pehrhovey	0:a548a085de55	36	class HTTPFileSystemHandler : public HTTPHandler {
pehrhovey	0:a548a085de55	37	public:
pehrhovey	0:a548a085de55	38	/**
pehrhovey	0:a548a085de55	39	* Create a new HTTPFileSzstemHandler.
pehrhovey	0:a548a085de55	40	* @param prefix The Prefix is the URL Proefix in witch the Handler will work.
pehrhovey	0:a548a085de55	41	* @param dir The Prefix will be directly mappt on the dir.
pehrhovey	0:a548a085de55	42	*/
pehrhovey	0:a548a085de55	43	HTTPFileSystemHandler(const char path, const char dir) : HTTPHandler(path), _dir(dir) {}
pehrhovey	0:a548a085de55	44	HTTPFileSystemHandler(HTTPServer server, const char path, const char *dir) : HTTPHandler(path), _dir(dir) { server->addHandler(this); }
pehrhovey	0:a548a085de55	45
pehrhovey	0:a548a085de55	46	private:
pehrhovey	0:a548a085de55	47	/**
pehrhovey	0:a548a085de55	48	* Check if a requested file exists.
pehrhovey	0:a548a085de55	49	* If it exists open it and store the data back in the HTTPConnection.
pehrhovey	0:a548a085de55	50	* We would not store connection specific data into the Handler.
pehrhovey	0:a548a085de55	51	* If the file exists and we cann serve a page return HTTP_OK else HTTP_NotFound.
pehrhovey	0:a548a085de55	52	* @param con The Connection which will be handled.
pehrhovey	0:a548a085de55	53	*/
pehrhovey	0:a548a085de55	54	virtual HTTPStatus init(HTTPConnection *con) const {
pehrhovey	0:a548a085de55	55	char filename[FILENAMELANGTH];
pehrhovey	0:a548a085de55	56	HTTPFileSystemData *data = new HTTPFileSystemData();
pehrhovey	0:a548a085de55	57	snprintf(filename, FILENAMELANGTH, "%s%s\0", _dir, con->getURL() + strlen(_prefix));
pehrhovey	0:a548a085de55	58	data->file = fopen(filename, "r");
pehrhovey	0:a548a085de55	59	if(!data->file) {
pehrhovey	0:a548a085de55	60	delete data;
pehrhovey	0:a548a085de55	61	return HTTP_NotFound;
pehrhovey	0:a548a085de55	62	}
pehrhovey	0:a548a085de55	63	data->fleft = fleft(data->file);
pehrhovey	0:a548a085de55	64	data->bleft = 0;
pehrhovey	0:a548a085de55	65	data->offset = 0;
pehrhovey	0:a548a085de55	66
pehrhovey	0:a548a085de55	67	con->data = data;
pehrhovey	0:a548a085de55	68	con->setLength(data->fleft);
pehrhovey	0:a548a085de55	69	loadFromFile(con);
pehrhovey	0:a548a085de55	70	return HTTP_OK;
pehrhovey	0:a548a085de55	71	}
pehrhovey	0:a548a085de55	72
pehrhovey	0:a548a085de55	73	/**
pehrhovey	0:a548a085de55	74	* Send the maximum available data chunk to the Client.
pehrhovey	0:a548a085de55	75	* If it is the last chunk close connection by returning HTTP_SuccessEnded
pehrhovey	0:a548a085de55	76	* @param con The connection to handle
pehrhovey	0:a548a085de55	77	* @param maximum The maximal available sendbuffer size.
pehrhovey	0:a548a085de55	78	* @return HTTP_Success when mor data is available or HTTP_SuccessEnded when the file is complete.
pehrhovey	0:a548a085de55	79	*/
pehrhovey	0:a548a085de55	80	virtual HTTPHandle send(HTTPConnection *con, int maximum) const {
pehrhovey	0:a548a085de55	81	HTTPFileSystemData data = static_cast<HTTPFileSystemData >(con->data);
pehrhovey	0:a548a085de55	82	err_t err;
pehrhovey	0:a548a085de55	83	u16_t len = min(data->bleft, maximum);
pehrhovey	0:a548a085de55	84	// printf("Send File\n");
pehrhovey	0:a548a085de55	85	if(len) {
pehrhovey	0:a548a085de55	86	do {
pehrhovey	0:a548a085de55	87	err = con->write(
pehrhovey	0:a548a085de55	88	&data->buffer[data->offset], len, (((!data->fleft)&&(data->bleft==len))?
pehrhovey	0:a548a085de55	89	(TCP_WRITE_FLAG_COPY \| TCP_WRITE_FLAG_MORE) : (TCP_WRITE_FLAG_COPY)));
pehrhovey	0:a548a085de55	90	if(err == ERR_MEM) {
pehrhovey	0:a548a085de55	91	len /= 2;
pehrhovey	0:a548a085de55	92	}
pehrhovey	0:a548a085de55	93	} while (err == ERR_MEM && len > 1);
pehrhovey	0:a548a085de55	94
pehrhovey	0:a548a085de55	95	if(err == ERR_OK) {
pehrhovey	0:a548a085de55	96	data->offset += len;
pehrhovey	0:a548a085de55	97	data->bleft -= len;
pehrhovey	0:a548a085de55	98	}
pehrhovey	0:a548a085de55	99	}
pehrhovey	0:a548a085de55	100	return loadFromFile(con);
pehrhovey	0:a548a085de55	101	}
pehrhovey	0:a548a085de55	102
pehrhovey	0:a548a085de55	103	/**
pehrhovey	0:a548a085de55	104	* Returns the left size of a file.
pehrhovey	0:a548a085de55	105	* @param fd The filehandler of which we want to know the filesize.
pehrhovey	0:a548a085de55	106	* @return The filesize of fd.
pehrhovey	0:a548a085de55	107	*/
pehrhovey	0:a548a085de55	108	long fleft(FILE *fd) const {
pehrhovey	0:a548a085de55	109	long len, cur;
pehrhovey	0:a548a085de55	110	cur = ftell(fd);
pehrhovey	0:a548a085de55	111	fseek(fd, 0, SEEK_END);
pehrhovey	0:a548a085de55	112	len = ftell(fd);
pehrhovey	0:a548a085de55	113	fseek(fd, cur, SEEK_SET);
pehrhovey	0:a548a085de55	114	return len;
pehrhovey	0:a548a085de55	115	}
pehrhovey	0:a548a085de55	116
pehrhovey	0:a548a085de55	117	/**
pehrhovey	0:a548a085de55	118	* Fill the buffer if the buffer is empty.
pehrhovey	0:a548a085de55	119	* If the file is complete close the filehandler and return HTTP_SuccessEnded.
pehrhovey	0:a548a085de55	120	*/
pehrhovey	0:a548a085de55	121	HTTPHandle loadFromFile(HTTPConnection *con) const {
pehrhovey	0:a548a085de55	122	HTTPFileSystemData data = static_cast<HTTPFileSystemData >(con->data);
pehrhovey	0:a548a085de55	123	if(!data->bleft) {
pehrhovey	0:a548a085de55	124	if(data->fleft) {
pehrhovey	0:a548a085de55	125	int len = fread(&data->buffer[0], sizeof(char), HTTP_BUFFER_SIZE, data->file);
pehrhovey	0:a548a085de55	126	data->fleft -= len;
pehrhovey	0:a548a085de55	127	data->bleft = len;
pehrhovey	0:a548a085de55	128	data->offset = 0;
pehrhovey	0:a548a085de55	129	} else {
pehrhovey	0:a548a085de55	130	if(data->file) {
pehrhovey	0:a548a085de55	131	fclose(data->file);
pehrhovey	0:a548a085de55	132	data->file = 0;
pehrhovey	0:a548a085de55	133	}
pehrhovey	0:a548a085de55	134	return HTTP_SuccessEnded;
pehrhovey	0:a548a085de55	135	}
pehrhovey	0:a548a085de55	136	}
pehrhovey	0:a548a085de55	137	return HTTP_Success;
pehrhovey	0:a548a085de55	138	}
pehrhovey	0:a548a085de55	139
pehrhovey	0:a548a085de55	140	/** The Directory which will replace the prefix of the URL */
pehrhovey	0:a548a085de55	141	const char *_dir;
pehrhovey	0:a548a085de55	142	};
pehrhovey	0:a548a085de55	143
pehrhovey	0:a548a085de55	144	#endif

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Mar 2010
Imports:	240
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	5

HTTPServer/HTTPFS.h@0:a548a085de55, 2010-03-14 (annotated)

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