David Smart / SW_HTTPServer

A simple web server that can be bound to either the EthernetInterface or the WiflyInterface.

Dependents:   Smart-WiFly-WebServer WattEye X10Svr SSDP_Server

SW_HTTPServer.h@16:6ebacf2946d8, 2013-09-01 (annotated)

Committer:
WiredHome
Date:
Sun Sep 01 19:19:08 2013 +0000
Revision:
16:6ebacf2946d8
Parent:
14:19c5f6151319
Child:
17:69ff00ce39f4
Default to non-blocking mode, and some minor documentation changes.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 1:54353af0d20a 1
WiredHome 1:54353af0d20a 2 #ifndef SW_HTTPSERVER_H
WiredHome 1:54353af0d20a 3 #define SW_HTTPSERVER_H
WiredHome 1:54353af0d20a 4 #include "mbed.h"
WiredHome 1:54353af0d20a 5 //#include "MODSERIAL.h" // would like to hook in mod serial for higher performance, less blocking
WiredHome 1:54353af0d20a 6 #include "Wifly.h"
WiredHome 1:54353af0d20a 7 #include "TCPSocketServer.h"
WiredHome 1:54353af0d20a 8 #include "TCPSocketConnection.h"
WiredHome 1:54353af0d20a 9
WiredHome 1:54353af0d20a 10 #ifdef MODSERIAL_H
WiredHome 1:54353af0d20a 11 #define PC MODSERIAL
WiredHome 1:54353af0d20a 12 #else
WiredHome 1:54353af0d20a 13 #define PC Serial
WiredHome 1:54353af0d20a 14 #endif
WiredHome 1:54353af0d20a 15
WiredHome 9:2ea342765c9d 16 /// This is the default buffer size used to send files. You might size
WiredHome 9:2ea342765c9d 17 /// this to be equal or less than the payload size of 1460 bytes.
WiredHome 9:2ea342765c9d 18 /// See User Manual 3.6.1.
WiredHome 9:2ea342765c9d 19 #define FILESEND_BUF_SIZE 1460
WiredHome 3:17928786bdb5 20
WiredHome 3:17928786bdb5 21
WiredHome 12:109bf1558300 22 /// MAX_HEADER_SIZE is the default size to contain the largest header.
WiredHome 9:2ea342765c9d 23 /// This is the size of the URL and query string, and also all the
WiredHome 3:17928786bdb5 24 /// other header information about the client. This can be
WiredHome 12:109bf1558300 25 /// a couple of K, larger if you have big forms as it includes the
WiredHome 3:17928786bdb5 26 /// form data that is submitted.
WiredHome 3:17928786bdb5 27 #define MAX_HEADER_SIZE 1000
WiredHome 3:17928786bdb5 28
WiredHome 9:2ea342765c9d 29
WiredHome 1:54353af0d20a 30 /// HTTPServer is a simple web server using the WiFly module.
WiredHome 12:109bf1558300 31 ///
WiredHome 3:17928786bdb5 32 /// While simple, it is a capable, web server. The basic mode
WiredHome 3:17928786bdb5 33 /// of operation is for it to serve static web pages from an available
WiredHome 3:17928786bdb5 34 /// file system.
WiredHome 12:109bf1558300 35 ///
WiredHome 3:17928786bdb5 36 /// The default page is index.htm (compile time defined)
WiredHome 3:17928786bdb5 37 /// standard support to serve a number of standard file types;
WiredHome 3:17928786bdb5 38 /// gif, jpg, jpeg, ico, png, zip, gz, tar, txt, pdf, htm, html
WiredHome 3:17928786bdb5 39 /// (this list is also compile time defined)
WiredHome 3:17928786bdb5 40 ///
WiredHome 3:17928786bdb5 41 /// It can also serve dynamically generated pages, and therefore
WiredHome 3:17928786bdb5 42 /// respond to form submission. Through the dynamic interface it is
WiredHome 3:17928786bdb5 43 /// then quite easy to interact with the hardware, reading the inputs
WiredHome 3:17928786bdb5 44 /// or signaling outputs.
WiredHome 3:17928786bdb5 45 ///
WiredHome 3:17928786bdb5 46 /// @code
WiredHome 13:8975d7928678 47 /// HTTPServer svr(&wifly, HTTP_SERVER_PORT, "/local/", 15, 30, 10, &pc);
WiredHome 3:17928786bdb5 48 /// svr.RegisterHandler("/dyn1", SimpleDynamicPage);
WiredHome 3:17928786bdb5 49 /// while (true)
WiredHome 3:17928786bdb5 50 /// {
WiredHome 3:17928786bdb5 51 /// svr.Poll(); // this is non blocking process, but variable execution
WiredHome 3:17928786bdb5 52 /// }
WiredHome 3:17928786bdb5 53 /// @endcode
WiredHome 3:17928786bdb5 54 ///
WiredHome 3:17928786bdb5 55 /// This web server used nweb as a starting point, but expanded well beyond there.
WiredHome 0:729320f63c5c 56 /// http://www.ibm.com/developerworks/systems/library/es-nweb/sidefile1.html
WiredHome 0:729320f63c5c 57 ///
WiredHome 3:17928786bdb5 58 /// @note This server uses a modified version of the mbed WiflyInterface - there
WiredHome 3:17928786bdb5 59 /// were a number of performance issues identified and resolved in the local version.
WiredHome 0:729320f63c5c 60 ///
WiredHome 3:17928786bdb5 61 /// Given: scheme://server:port/path?query_string#fragment_id
WiredHome 0:729320f63c5c 62 /// @li scheme is "http"
WiredHome 3:17928786bdb5 63 /// @li server is whatever IP the server has
WiredHome 0:729320f63c5c 64 /// @li port is the registered port
WiredHome 0:729320f63c5c 65 /// @li /path is the reference to the file (actual or logical) on the server
WiredHome 0:729320f63c5c 66 /// @li query_string is any combination of name=value pairs
WiredHome 0:729320f63c5c 67 /// @li fragment_id is a reference to an anchor on the page
WiredHome 0:729320f63c5c 68 ///
WiredHome 3:17928786bdb5 69 /// Features:
WiredHome 3:17928786bdb5 70 /// @li Serves static pages from a file system. Many normal filetypes are
WiredHome 3:17928786bdb5 71 /// supported.
WiredHome 3:17928786bdb5 72 /// @li Compile time configurable for the "default" file, typically index.htm.
WiredHome 3:17928786bdb5 73 /// @li Provides a registration interface for dynamically generated pages that
WiredHome 3:17928786bdb5 74 /// can then interact with other hardware.
WiredHome 3:17928786bdb5 75 /// @li Revised to be Non-blocking, however the execution time is variable
WiredHome 7:99ad7a67f05e 76 /// depending on the actions being performed and can span hundreds of msec.
WiredHome 3:17928786bdb5 77 ///
WiredHome 3:17928786bdb5 78 /// Limitations:
WiredHome 3:17928786bdb5 79 /// @li Supports only a single connection at a time.
WiredHome 3:17928786bdb5 80 /// @li Rapid requests for page objects (e.g. embedded images) are lost. Still
WiredHome 3:17928786bdb5 81 /// working to understand this issue.
WiredHome 3:17928786bdb5 82 ///
WiredHome 3:17928786bdb5 83 /// ToDo:
WiredHome 3:17928786bdb5 84 /// @li A web page with served objects (img src=...) is rarely served properly. It
WiredHome 3:17928786bdb5 85 /// might trace to forcing the connection to close, but not yet sure.
WiredHome 3:17928786bdb5 86 /// Explore "Set Uart Rx Data Buffer" in WiFly manual 2.3.65
WiredHome 3:17928786bdb5 87 /// @li hunt down lengthy operations - there seems to be a long timeout somewhere.
WiredHome 3:17928786bdb5 88 /// @li parse the header similar to the query string, and then make
WiredHome 2:a29c32190037 89 /// those parameters accessible - perhaps like environment vars.
WiredHome 3:17928786bdb5 90 /// @li move part of the POST method handler to the registered handler, so
WiredHome 0:729320f63c5c 91 /// it can decide if it should allocate the needed memory.
WiredHome 3:17928786bdb5 92 /// @li Add password capability to some web pages
WiredHome 3:17928786bdb5 93 /// @li transform the pc serial interface to a log interface, which might
WiredHome 0:729320f63c5c 94 /// be more useful.
WiredHome 3:17928786bdb5 95 /// @li Add ability to put WiFly in AP mode and then configuration pages
WiredHome 2:a29c32190037 96 /// to find and join a network.
WiredHome 3:17928786bdb5 97 /// @li Add ability to change/update SW in the WiFly module
WiredHome 3:17928786bdb5 98 /// @li Add ability to upload a new application to the mbed
WiredHome 2:a29c32190037 99 ///
WiredHome 2:a29c32190037 100 /// History:
WiredHome 2:a29c32190037 101 /// @li 20130530 Initial version
WiredHome 2:a29c32190037 102 /// @li 20130601 Renamed ip_process to Poll
WiredHome 3:17928786bdb5 103 /// @li 20130617 Cleaned up some of the documentation changes
WiredHome 3:17928786bdb5 104 /// @li 20130623 Make it non-blocking. "Poll" takes a variable amount
WiredHome 3:17928786bdb5 105 /// of time, based on whether it is idle, or how much it
WiredHome 3:17928786bdb5 106 /// has to do.
WiredHome 0:729320f63c5c 107 ///
WiredHome 0:729320f63c5c 108 /// @note Copyright © 2013 by Smartware Computing, all rights reserved.
WiredHome 0:729320f63c5c 109 /// Individuals may use this application for evaluation or non-commercial
WiredHome 0:729320f63c5c 110 /// purposes. Within this restriction, changes may be made to this application
WiredHome 0:729320f63c5c 111 /// as long as this copyright notice is retained. The user shall make
WiredHome 0:729320f63c5c 112 /// clear that their work is a derived work, and not the original.
WiredHome 0:729320f63c5c 113 /// Users of this application and sources accept this application "as is" and
WiredHome 0:729320f63c5c 114 /// shall hold harmless Smartware Computing, for any undesired results while
WiredHome 0:729320f63c5c 115 /// using this application - whether real or imagined.
WiredHome 0:729320f63c5c 116 ///
WiredHome 0:729320f63c5c 117 /// @author David Smart, Smartware Computing
WiredHome 0:729320f63c5c 118 ///
WiredHome 0:729320f63c5c 119 class HTTPServer
WiredHome 0:729320f63c5c 120 {
WiredHome 0:729320f63c5c 121 public:
WiredHome 0:729320f63c5c 122 /**
WiredHome 3:17928786bdb5 123 * name-value pairs for parameters
WiredHome 0:729320f63c5c 124 */
WiredHome 3:17928786bdb5 125 typedef struct NAMEVALUE {
WiredHome 0:729320f63c5c 126 char * name;
WiredHome 0:729320f63c5c 127 char * value;
WiredHome 0:729320f63c5c 128 } namevalue;
WiredHome 12:109bf1558300 129
WiredHome 2:a29c32190037 130 /**
WiredHome 3:17928786bdb5 131 * Indicates the purpose of the Handler callback
WiredHome 3:17928786bdb5 132 *
WiredHome 12:109bf1558300 133 * Application code in a dynamic page uses this to determine the state
WiredHome 3:17928786bdb5 134 * and therefore the needed operation to be performed.
WiredHome 3:17928786bdb5 135 *
WiredHome 3:17928786bdb5 136 * @code
WiredHome 13:8975d7928678 137 * bool SimpleDynamicPage(HTTPServer *svr, HTTPServer::CallBackType type,
WiredHome 13:8975d7928678 138 * const char * path, const HTTPServer::namevalue *queryParams,
WiredHome 13:8975d7928678 139 * int queryParamCount) {
WiredHome 3:17928786bdb5 140 * char buf[100];
WiredHome 3:17928786bdb5 141 * bool ret = false;
WiredHome 12:109bf1558300 142 *
WiredHome 3:17928786bdb5 143 * switch (type) {
WiredHome 3:17928786bdb5 144 * case HTTPServer::SEND_PAGE:
WiredHome 3:17928786bdb5 145 * svr->header(200, "OK", "Content-Type: text/html\r\n");
WiredHome 3:17928786bdb5 146 * svr->send("<html><head><title>Dynamic Page</title></head>\r\n");
WiredHome 3:17928786bdb5 147 * svr->send("<body>\r\n");
WiredHome 3:17928786bdb5 148 * svr->send("This page was generated dynamically. Create your own name=value pairs on the URL "
WiredHome 3:17928786bdb5 149 * "which uses the GET method.<br/>\r\n");
WiredHome 13:8975d7928678 150 * sprintf(buf, "%d parameters passed to {%s}:<br/>\r\n", queryParamCount, path);
WiredHome 3:17928786bdb5 151 * svr->send(buf);
WiredHome 13:8975d7928678 152 * for (int i=0; i<queryParamCount; i++) {
WiredHome 13:8975d7928678 153 * sprintf(buf, "%d: %s = %s<br/>\r\n", i, queryParams[i].name, queryParams[i].value);
WiredHome 3:17928786bdb5 154 * svr->send(buf);
WiredHome 3:17928786bdb5 155 * }
WiredHome 3:17928786bdb5 156 * svr->send("<br/><a href='/'>back to main</a></body></html>\r\n");
WiredHome 3:17928786bdb5 157 * ret = true;
WiredHome 3:17928786bdb5 158 * break;
WiredHome 3:17928786bdb5 159 * case HTTPServer::CONTENT_LENGTH_REQUEST:
WiredHome 3:17928786bdb5 160 * ret = true;
WiredHome 3:17928786bdb5 161 * break;
WiredHome 3:17928786bdb5 162 * case HTTPServer::DATA_TRANSFER:
WiredHome 3:17928786bdb5 163 * ret = true;
WiredHome 3:17928786bdb5 164 * break;
WiredHome 3:17928786bdb5 165 * default:
WiredHome 3:17928786bdb5 166 * ret = false;
WiredHome 3:17928786bdb5 167 * break;
WiredHome 3:17928786bdb5 168 * }
WiredHome 3:17928786bdb5 169 * return ret;
WiredHome 3:17928786bdb5 170 * }
WiredHome 3:17928786bdb5 171 * @endcode
WiredHome 2:a29c32190037 172 */
WiredHome 3:17928786bdb5 173 typedef enum CALLBACKTYPE {
WiredHome 14:19c5f6151319 174 CONTENT_LENGTH_REQUEST, ///< ask the client if they wish to accept the data, typically from a POST event
WiredHome 3:17928786bdb5 175 DATA_TRANSFER, ///< not currently used, may allow "chunking" the data to the client
WiredHome 3:17928786bdb5 176 SEND_PAGE, ///< the activated method should now send the page
WiredHome 2:a29c32190037 177 } CallBackType;
WiredHome 0:729320f63c5c 178
WiredHome 12:109bf1558300 179 /**
WiredHome 3:17928786bdb5 180 * This is the prototype for custom handlers that are activated via a callback
WiredHome 0:729320f63c5c 181 *
WiredHome 3:17928786bdb5 182 * This callback gets overloaded for a few purposes, which can be identified by the \see CallBackType parameter
WiredHome 12:109bf1558300 183 * @li SEND_PAGE - the callback should now send the html page, using as many svr->send() as needed.
WiredHome 2:a29c32190037 184 * When the callback returns, it should always indicate true.
WiredHome 2:a29c32190037 185 * @li CONTENT_LENGTH_REQUEST - the server is asking the callback if it wants to receive the message,
WiredHome 2:a29c32190037 186 * which may require significant memory. If the request is accepted, true should be returned.
WiredHome 2:a29c32190037 187 * If the request is denied, false should be returned.
WiredHome 12:109bf1558300 188 *
WiredHome 0:729320f63c5c 189 * @param svr is a handle to this class, so the callback has access to member functions
WiredHome 13:8975d7928678 190 * @param queryParams is a pointer to an array of name value pairs
WiredHome 13:8975d7928678 191 * @queryParamCount is the number of parameters.
WiredHome 2:a29c32190037 192 * @return true if command was accepted
WiredHome 0:729320f63c5c 193 */
WiredHome 13:8975d7928678 194 typedef bool (* Handler)(HTTPServer * svr, CallBackType type, const char *path, const namevalue *queryParams, int queryParamCount);
WiredHome 12:109bf1558300 195
WiredHome 0:729320f63c5c 196 /**
WiredHome 0:729320f63c5c 197 * Create the HTTPServer object.
WiredHome 12:109bf1558300 198 *
WiredHome 0:729320f63c5c 199 * @param wifly is the serial port with the wifly interface.
WiredHome 0:729320f63c5c 200 * @param port is the optional parameter for the port number to use, default is 80.
WiredHome 0:729320f63c5c 201 * @param webroot is a file system path to the root folder for the web space.
WiredHome 13:8975d7928678 202 * @param maxheaderParams defines the maximum number of parameters to extract from a header (Host: 192..\r\nConnection: keep-alive\r\n...)
WiredHome 13:8975d7928678 203 * @param maxqueryParams defines the maximum number of query parameters to a dynamic function (and the memory to support them).
WiredHome 0:729320f63c5c 204 * @param maxdynamicpages defines the maximum number of dynamic pages that can be registered.
WiredHome 0:729320f63c5c 205 * @param pc is the serial port for debug information (I should transform this to a log interface)
WiredHome 3:17928786bdb5 206 * @param allocforheader is the memory allocation to support the largest expected header from a client
WiredHome 12:109bf1558300 207 * @param allocforfile is the memory allocation to support sending a file to the client. This is typically sized to fit
WiredHome 3:17928786bdb5 208 * an ethernet frame.
WiredHome 0:729320f63c5c 209 */
WiredHome 13:8975d7928678 210 HTTPServer(Wifly * wifly, int port = 80, const char * webroot = "/", int maxheaderParams = 15, int maxqueryParams = 30, int maxdynamicpages = 10,
WiredHome 12:109bf1558300 211 PC * pc = NULL, int _allocforheader = MAX_HEADER_SIZE, int _allocforfile = FILESEND_BUF_SIZE);
WiredHome 12:109bf1558300 212
WiredHome 0:729320f63c5c 213 /**
WiredHome 3:17928786bdb5 214 * Destructor, which can clean up memory.
WiredHome 0:729320f63c5c 215 */
WiredHome 0:729320f63c5c 216 ~HTTPServer();
WiredHome 12:109bf1558300 217
WiredHome 0:729320f63c5c 218 /**
WiredHome 3:17928786bdb5 219 * The process to call whenever there is free time, as this basically does
WiredHome 0:729320f63c5c 220 * all the work to monitor for connections and handle replies.
WiredHome 2:a29c32190037 221 *
WiredHome 2:a29c32190037 222 * 20130601 Renamed from ip_process to Poll
WiredHome 0:729320f63c5c 223 */
WiredHome 2:a29c32190037 224 void Poll();
WiredHome 12:109bf1558300 225
WiredHome 0:729320f63c5c 226 /**
WiredHome 12:109bf1558300 227 * Send typical header data, and some optional data back to the client.
WiredHome 3:17928786bdb5 228 *
WiredHome 3:17928786bdb5 229 * This forms and sends the typical header back to the client. It may also send
WiredHome 3:17928786bdb5 230 * optional data (which must end with "\r\n"). It then sends the second newline
WiredHome 3:17928786bdb5 231 * sequence that signals the end of the header.
WiredHome 0:729320f63c5c 232 *
WiredHome 0:729320f63c5c 233 * @param code is the optional return code; 200 = OK, if not provided then 404 = Not found is returned
WiredHome 0:729320f63c5c 234 * @param code_text is the text to align with the code (e.g. 404, "Not Found")
WiredHome 0:729320f63c5c 235 * @param content_type is a pointer to "Content-Type: text/html\r\n" (for example)
WiredHome 3:17928786bdb5 236 * @param optional_text is a pointer to any other text that is part of the header, which must
WiredHome 3:17928786bdb5 237 * have \r\n termination.
WiredHome 0:729320f63c5c 238 */
WiredHome 0:729320f63c5c 239 void header(int code = 404, const char * code_text = "Not Found", const char * content_type = NULL, const char * optional_text = NULL);
WiredHome 0:729320f63c5c 240
WiredHome 0:729320f63c5c 241 /**
WiredHome 0:729320f63c5c 242 * Send text to the client
WiredHome 0:729320f63c5c 243 *
WiredHome 3:17928786bdb5 244 * This sends the specified text to the client. If the number of bytes is not set,
WiredHome 3:17928786bdb5 245 * then it calculates the number of bytes as a string. For binary transfers, the
WiredHome 3:17928786bdb5 246 * number of bytes to send is required for proper operation.
WiredHome 3:17928786bdb5 247 *
WiredHome 0:729320f63c5c 248 * @param msg is the text string to send
WiredHome 0:729320f63c5c 249 * @param bytes is the number of bytes to send. If not set, then strlen is calculated.
WiredHome 0:729320f63c5c 250 */
WiredHome 0:729320f63c5c 251 void send(const char * msg, int bytes = -1);
WiredHome 12:109bf1558300 252
WiredHome 0:729320f63c5c 253 /**
WiredHome 3:17928786bdb5 254 * Send a referenced file to the client, including the header
WiredHome 3:17928786bdb5 255 *
WiredHome 3:17928786bdb5 256 * This sends a file from the filesystem to the client. It must be of a supported type
WiredHome 3:17928786bdb5 257 * in order to properly create the header.
WiredHome 0:729320f63c5c 258 *
WiredHome 0:729320f63c5c 259 * @param filename is the fully qualified path and filename
WiredHome 3:17928786bdb5 260 * @param filetype is the header information (e.g. "Content-Type: application/pdf")
WiredHome 0:729320f63c5c 261 * @return true if it thinks it sent ok, false otherwise.
WiredHome 0:729320f63c5c 262 */
WiredHome 0:729320f63c5c 263 bool SendFile(const char * filename, const char * filetype);
WiredHome 12:109bf1558300 264
WiredHome 12:109bf1558300 265 /**
WiredHome 0:729320f63c5c 266 * register a handler for a specific URL.
WiredHome 0:729320f63c5c 267 *
WiredHome 3:17928786bdb5 268 * This api lets you register a dynamic handler in the web server. This is
WiredHome 3:17928786bdb5 269 * most useful for interactive web pages, rather than simply serving static
WiredHome 3:17928786bdb5 270 * pages.
WiredHome 3:17928786bdb5 271 *
WiredHome 3:17928786bdb5 272 * @code
WiredHome 12:109bf1558300 273 *
WiredHome 3:17928786bdb5 274 * ...
WiredHome 3:17928786bdb5 275 * svr.RegisterHandler("/dyn1", SimpleDynamicPage);svr.RegisterHandler("/dyn1", SimpleDynamicPage);
WiredHome 3:17928786bdb5 276 * ...
WiredHome 3:17928786bdb5 277 *
WiredHome 13:8975d7928678 278 * bool SimpleDynamicPage(HTTPServer *svr, HTTPServer::CallBackType type, const char * path, const HTTPServer::namevalue *queryParams, int queryParamCount) {
WiredHome 3:17928786bdb5 279 * char buf[100];
WiredHome 3:17928786bdb5 280 * bool ret = false;
WiredHome 12:109bf1558300 281 *
WiredHome 3:17928786bdb5 282 * switch (type) {
WiredHome 3:17928786bdb5 283 * case HTTPServer::SEND_PAGE:
WiredHome 3:17928786bdb5 284 * svr->header(200, "OK", "Content-Type: text/html\r\n");
WiredHome 3:17928786bdb5 285 * svr->send("<html><head><title>Dynamic Page</title></head>\r\n");
WiredHome 3:17928786bdb5 286 * svr->send("<body>\r\n");
WiredHome 3:17928786bdb5 287 * svr->send("This page was generated dynamically. Create your own name=value pairs on the URL "
WiredHome 3:17928786bdb5 288 * "which uses the GET method.<br/>\r\n");
WiredHome 13:8975d7928678 289 * sprintf(buf, "%d parameters passed to {%s}:<br/>\r\n", queryParamCount, path);
WiredHome 3:17928786bdb5 290 * svr->send(buf);
WiredHome 13:8975d7928678 291 * for (int i=0; i<queryParamCount; i++) {
WiredHome 13:8975d7928678 292 * sprintf(buf, "%d: %s = %s<br/>\r\n", i, queryParams[i].name, queryParams[i].value);
WiredHome 3:17928786bdb5 293 * svr->send(buf);
WiredHome 3:17928786bdb5 294 * }
WiredHome 3:17928786bdb5 295 * svr->send("Stats:<br/>\r\n");
WiredHome 3:17928786bdb5 296 * sprintf(buf,"Free memory space: %d<br/>\r\n", Free());
WiredHome 3:17928786bdb5 297 * svr->send(buf);
WiredHome 3:17928786bdb5 298 * sprintf(buf,"Max Header size: %d<br/>\r\n", svr->GetMaxHeaderSize());
WiredHome 3:17928786bdb5 299 * svr->send(buf);
WiredHome 3:17928786bdb5 300 * svr->send("<br/><a href='/'>back to main</a></body></html>\r\n");
WiredHome 3:17928786bdb5 301 * ret = true;
WiredHome 3:17928786bdb5 302 * break;
WiredHome 3:17928786bdb5 303 * case HTTPServer::CONTENT_LENGTH_REQUEST:
WiredHome 3:17928786bdb5 304 * ret = true;
WiredHome 3:17928786bdb5 305 * break;
WiredHome 3:17928786bdb5 306 * case HTTPServer::DATA_TRANSFER:
WiredHome 3:17928786bdb5 307 * ret = true;
WiredHome 3:17928786bdb5 308 * break;
WiredHome 3:17928786bdb5 309 * default:
WiredHome 3:17928786bdb5 310 * ret = false;
WiredHome 3:17928786bdb5 311 * break;
WiredHome 3:17928786bdb5 312 * }
WiredHome 3:17928786bdb5 313 * return ret;
WiredHome 3:17928786bdb5 314 * }
WiredHome 3:17928786bdb5 315 * @endcode
WiredHome 3:17928786bdb5 316 *
WiredHome 0:729320f63c5c 317 * @param path to register
WiredHome 0:729320f63c5c 318 * @param callback of type Handler
WiredHome 0:729320f63c5c 319 * @return true if successfully registered
WiredHome 0:729320f63c5c 320 */
WiredHome 0:729320f63c5c 321 bool RegisterHandler(const char * path, Handler callback);
WiredHome 12:109bf1558300 322
WiredHome 0:729320f63c5c 323 /**
WiredHome 16:6ebacf2946d8 324 * determine if the named file is a supported type (htm, html, jpg, etc)
WiredHome 0:729320f63c5c 325 *
WiredHome 3:17928786bdb5 326 * if you pass in a filename, it will attempt to extract the extension
WiredHome 3:17928786bdb5 327 * and compare that to the list of supported file types. If it finds a
WiredHome 3:17928786bdb5 328 * match, then it will return a pointer to the content-type string.
WiredHome 3:17928786bdb5 329 *
WiredHome 3:17928786bdb5 330 * @code
WiredHome 3:17928786bdb5 331 * fType = GetSupportedType("mypix.jpg");
WiredHome 3:17928786bdb5 332 * if (fType) {
WiredHome 3:17928786bdb5 333 * ...
WiredHome 3:17928786bdb5 334 * @endcode
WiredHome 12:109bf1558300 335 *
WiredHome 0:729320f63c5c 336 * @param filename is the filename to test, based on the extension
WiredHome 0:729320f63c5c 337 * @return pointer to a Content-Type string if supported, or NULL if not.
WiredHome 0:729320f63c5c 338 */
WiredHome 0:729320f63c5c 339 const char * GetSupportedType(const char * filename);
WiredHome 0:729320f63c5c 340
WiredHome 0:729320f63c5c 341 /**
WiredHome 0:729320f63c5c 342 * search the available parameters for 'name' and if found, return the 'value'
WiredHome 0:729320f63c5c 343 *
WiredHome 12:109bf1558300 344 * After the querystring is parsed, the server maintains an array of
WiredHome 3:17928786bdb5 345 * name=value pairs. This Get function will search for the passed in name
WiredHome 3:17928786bdb5 346 * and provide access to the value.
WiredHome 3:17928786bdb5 347 *
WiredHome 3:17928786bdb5 348 * @code
WiredHome 3:17928786bdb5 349 * BusOut leds(LED1,LED2,LED3,LED4);
WiredHome 3:17928786bdb5 350 * ...
WiredHome 3:17928786bdb5 351 * leds = atoi(svr->GetParameter("leds"));
WiredHome 3:17928786bdb5 352 * @endcode
WiredHome 3:17928786bdb5 353 *
WiredHome 0:729320f63c5c 354 * @param name is the name to search for
WiredHome 0:729320f63c5c 355 * @return pointer to the value, or NULL
WiredHome 0:729320f63c5c 356 */
WiredHome 0:729320f63c5c 357 const char * GetParameter(const char * name);
WiredHome 0:729320f63c5c 358
WiredHome 0:729320f63c5c 359 /**
WiredHome 12:109bf1558300 360 * Parse the text string into name=value parameters.
WiredHome 3:17928786bdb5 361 *
WiredHome 12:109bf1558300 362 * This will directly modify the referenced string. If there is a
WiredHome 3:17928786bdb5 363 * #fragment_id on the end of the string, it will be removed.
WiredHome 0:729320f63c5c 364 *
WiredHome 0:729320f63c5c 365 * @param pString is a pointer to the string.
WiredHome 0:729320f63c5c 366 */
WiredHome 0:729320f63c5c 367 void ParseParameters(char * pString);
WiredHome 12:109bf1558300 368
WiredHome 0:729320f63c5c 369 /**
WiredHome 16:6ebacf2946d8 370 * Unescape string converts a coded string "in place" into a normal string.
WiredHome 3:17928786bdb5 371 *
WiredHome 3:17928786bdb5 372 * A query string will have a number of characters replaced for communication
WiredHome 3:17928786bdb5 373 * which includes spaces, quotes, question marks and more. Most of them
WiredHome 12:109bf1558300 374 * will be replaced with a %xx format, where xx is the hex code for the
WiredHome 3:17928786bdb5 375 * character. Since the string will only get shorter when this happens
WiredHome 3:17928786bdb5 376 * the operation is performed in place.
WiredHome 3:17928786bdb5 377 *
WiredHome 0:729320f63c5c 378 * this "This%20is%20a%20question%3F%20and%20an%20answer."
WiredHome 12:109bf1558300 379 *
WiredHome 0:729320f63c5c 380 * becomes "This is a question? and an answer."
WiredHome 3:17928786bdb5 381 *
WiredHome 0:729320f63c5c 382 * @note '+' is another form of space, so is converted to a space before the %xx
WiredHome 0:729320f63c5c 383 *
WiredHome 0:729320f63c5c 384 * @param encoded string to be converted
WiredHome 0:729320f63c5c 385 */
WiredHome 0:729320f63c5c 386 void UnescapeString(char * encoded);
WiredHome 12:109bf1558300 387
WiredHome 0:729320f63c5c 388 /**
WiredHome 0:729320f63c5c 389 * Get the IP address of the remote node to which we are connected.
WiredHome 3:17928786bdb5 390 *
WiredHome 3:17928786bdb5 391 * This will get the IP address of the remote node to which we are
WiredHome 12:109bf1558300 392 * currently connected. This is written into the buffer in
WiredHome 3:17928786bdb5 393 * "192.168.100.234" format. If the buffer size is note >= 16 bytes,
WiredHome 3:17928786bdb5 394 * it will set the buffer to null.
WiredHome 12:109bf1558300 395 *
WiredHome 3:17928786bdb5 396 * @note This switches the module into, and out of, command mode
WiredHome 12:109bf1558300 397 * which has quite a time penalty.
WiredHome 3:17928786bdb5 398 *
WiredHome 3:17928786bdb5 399 * @param str is the string to write the address into, which should be at
WiredHome 3:17928786bdb5 400 * least as large as "192.168.100.203" (16-bytes).
WiredHome 4:f34642902056 401 * @param strSize of the str buffer must be >=16, so it will not buffer overrun.
WiredHome 5:c9b27e718054 402 * @returns true if it succeeded, false otherwise
WiredHome 0:729320f63c5c 403 */
WiredHome 5:c9b27e718054 404 bool GetRemoteAddr(char * str, int strSize);
WiredHome 0:729320f63c5c 405
WiredHome 12:109bf1558300 406 /**
WiredHome 16:6ebacf2946d8 407 * This is used to force a connection to close.
WiredHome 3:17928786bdb5 408 *
WiredHome 3:17928786bdb5 409 * This switches the module into command mode, performs the close,
WiredHome 3:17928786bdb5 410 * then switches it back to data mode. So, this is a time-expensive
WiredHome 3:17928786bdb5 411 * command.
WiredHome 7:99ad7a67f05e 412 *
WiredHome 7:99ad7a67f05e 413 * @returns true if successful
WiredHome 0:729320f63c5c 414 */
WiredHome 7:99ad7a67f05e 415 bool close_connection();
WiredHome 12:109bf1558300 416
WiredHome 3:17928786bdb5 417 /**
WiredHome 16:6ebacf2946d8 418 * Diagnostic to get the size of the largest header.
WiredHome 3:17928786bdb5 419 *
WiredHome 12:109bf1558300 420 * This is a diagnostic function, so you can resize the allocated
WiredHome 12:109bf1558300 421 * buffer for your application. With proper sizing, more of the
WiredHome 3:17928786bdb5 422 * system memory is available for your application.
WiredHome 3:17928786bdb5 423 *
WiredHome 3:17928786bdb5 424 * @code
WiredHome 3:17928786bdb5 425 * sprintf(buf,"Max Header size: %d<br/>\r\n", svr->GetMaxHeaderSize());
WiredHome 3:17928786bdb5 426 * svr->send(buf);
WiredHome 3:17928786bdb5 427 * @endcode
WiredHome 12:109bf1558300 428 *
WiredHome 3:17928786bdb5 429 * @returns size in bytes of the larger header measured.
WiredHome 3:17928786bdb5 430 */
WiredHome 3:17928786bdb5 431 int GetMaxHeaderSize();
WiredHome 3:17928786bdb5 432
WiredHome 13:8975d7928678 433 /**
WiredHome 16:6ebacf2946d8 434 * Get a value from the http header, if it exists.
WiredHome 13:8975d7928678 435 *
WiredHome 13:8975d7928678 436 * @param hdr is the string to search for (e.g. "Content-Length")
WiredHome 13:8975d7928678 437 *
WiredHome 13:8975d7928678 438 * @returns pointer to the value associated with that header.
WiredHome 13:8975d7928678 439 * @returns NULL if the header is not found.
WiredHome 13:8975d7928678 440 */
WiredHome 13:8975d7928678 441 const char * GetHeaderValue(const char * hdr);
WiredHome 3:17928786bdb5 442
WiredHome 3:17928786bdb5 443 /**
WiredHome 3:17928786bdb5 444 * Performance parameter
WiredHome 3:17928786bdb5 445 */
WiredHome 3:17928786bdb5 446 typedef struct SW_PERFPARAM {
WiredHome 3:17928786bdb5 447 unsigned long long TotalTime_us;
WiredHome 3:17928786bdb5 448 unsigned long Samples;
WiredHome 3:17928786bdb5 449 unsigned long MaxTime_us;
WiredHome 3:17928786bdb5 450 } SW_PerformanceParam;
WiredHome 12:109bf1558300 451
WiredHome 3:17928786bdb5 452 /**
WiredHome 3:17928786bdb5 453 * Performance metrics
WiredHome 3:17928786bdb5 454 */
WiredHome 3:17928786bdb5 455 typedef struct SW_PERFDATA {
WiredHome 3:17928786bdb5 456 SW_PerformanceParam Header;
WiredHome 3:17928786bdb5 457 SW_PerformanceParam SendData;
WiredHome 3:17928786bdb5 458 //SW_PerformanceParam SendFile;
WiredHome 3:17928786bdb5 459 } SW_PerformanceData;
WiredHome 12:109bf1558300 460
WiredHome 3:17928786bdb5 461 /**
WiredHome 3:17928786bdb5 462 * Get performance metrics from the web server.
WiredHome 3:17928786bdb5 463 *
WiredHome 3:17928786bdb5 464 * This is a diagnostic function, and gathers data on the internal
WiredHome 3:17928786bdb5 465 * performance of the server, as it works various actions.
WiredHome 3:17928786bdb5 466 *
WiredHome 3:17928786bdb5 467 * @param p is a pointer to a SW_PerformanceData structure to be populated
WiredHome 3:17928786bdb5 468 */
WiredHome 3:17928786bdb5 469 void GetPerformanceData(SW_PerformanceData * p);
WiredHome 12:109bf1558300 470
WiredHome 3:17928786bdb5 471 /**
WiredHome 3:17928786bdb5 472 * Reset performance metrics.
WiredHome 3:17928786bdb5 473 */
WiredHome 3:17928786bdb5 474 void ResetPerformanceData();
WiredHome 12:109bf1558300 475
WiredHome 5:c9b27e718054 476 /**
WiredHome 5:c9b27e718054 477 * Get the underlying wifly object.
WiredHome 6:fdce4464d92b 478 *
WiredHome 6:fdce4464d92b 479 * This lets you get to the underlying wifly object in order to
WiredHome 6:fdce4464d92b 480 * interact with it.
WiredHome 6:fdce4464d92b 481 *
WiredHome 6:fdce4464d92b 482 * @code
WiredHome 13:8975d7928678 483 * HTTPServer svr(&wifly, HTTP_SERVER_PORT, "/local/", 15, 30, 10, &pc);
WiredHome 6:fdce4464d92b 484 * ...
WiredHome 6:fdce4464d92b 485 * svr->GetWifly()->getWiflyVerString()
WiredHome 6:fdce4464d92b 486 * @endcode
WiredHome 6:fdce4464d92b 487 *
WiredHome 6:fdce4464d92b 488 * returns the wifly option.
WiredHome 5:c9b27e718054 489 */
WiredHome 12:109bf1558300 490 Wifly * GetWifly() {
WiredHome 12:109bf1558300 491 return wifly;
WiredHome 12:109bf1558300 492 };
WiredHome 0:729320f63c5c 493
WiredHome 0:729320f63c5c 494 private:
WiredHome 0:729320f63c5c 495 Wifly * wifly;
WiredHome 0:729320f63c5c 496 char * webroot;
WiredHome 0:729320f63c5c 497 PC * pc;
WiredHome 0:729320f63c5c 498 TCPSocketServer * server;
WiredHome 0:729320f63c5c 499 TCPSocketConnection client;
WiredHome 0:729320f63c5c 500 char * rewriteWithDefaultFile(char * queryString);
WiredHome 0:729320f63c5c 501 char * rewritePrependWebroot(char * queryString);
WiredHome 13:8975d7928678 502
WiredHome 13:8975d7928678 503 namevalue *queryParams; // Query Parameters from the URL this=that&sky=blue&...
WiredHome 13:8975d7928678 504 int maxqueryParams;
WiredHome 13:8975d7928678 505 int queryParamCount;
WiredHome 13:8975d7928678 506
WiredHome 13:8975d7928678 507 namevalue *headerParams; // Header params Host: 192.168...\r\nConnection: keep-alive\r\n...
WiredHome 13:8975d7928678 508 int maxheaderParams;
WiredHome 13:8975d7928678 509 int headerParamCount;
WiredHome 13:8975d7928678 510
WiredHome 3:17928786bdb5 511 int maxheaderbytes;
WiredHome 3:17928786bdb5 512 char * headerbuffer;
WiredHome 3:17928786bdb5 513 int headerbuffersize;
WiredHome 12:109bf1558300 514
WiredHome 10:9c8d2c6a3469 515 Timer PerformanceTimer;
WiredHome 3:17928786bdb5 516 /**
WiredHome 3:17928786bdb5 517 * Records performance data
WiredHome 12:109bf1558300 518 *
WiredHome 3:17928786bdb5 519 * This will take a pointer to a SW_PerformanceParam, and it will
WiredHome 3:17928786bdb5 520 * take the time when the performance measurement started. It locally
WiredHome 3:17928786bdb5 521 * accesses the current time to measure the elapsed.
WiredHome 3:17928786bdb5 522 *
WiredHome 3:17928786bdb5 523 * @param param is the performance parameter to update
WiredHome 3:17928786bdb5 524 * @param value is the reference time.
WiredHome 3:17928786bdb5 525 * @returns the current time which may be used as the reference time
WiredHome 3:17928786bdb5 526 * for further measurements.
WiredHome 3:17928786bdb5 527 */
WiredHome 16:6ebacf2946d8 528 unsigned int RecordPerformanceData(SW_PerformanceParam * param, unsigned int value);
WiredHome 3:17928786bdb5 529 SW_PerformanceData perfData;
WiredHome 12:109bf1558300 530
WiredHome 3:17928786bdb5 531 typedef struct HANDLER {
WiredHome 0:729320f63c5c 532 char * path;
WiredHome 0:729320f63c5c 533 Handler callback;
WiredHome 0:729320f63c5c 534 } handler;
WiredHome 0:729320f63c5c 535 int maxdynamicpages;
WiredHome 0:729320f63c5c 536 handler *handlers;
WiredHome 0:729320f63c5c 537 int handlercount;
WiredHome 3:17928786bdb5 538
WiredHome 3:17928786bdb5 539 char * queryType;
WiredHome 3:17928786bdb5 540 char * queryString;
WiredHome 13:8975d7928678 541 // char * hostString;
WiredHome 13:8975d7928678 542 // char * contentLength;
WiredHome 13:8975d7928678 543 // char * contentType;
WiredHome 13:8975d7928678 544 // char * authorization;
WiredHome 3:17928786bdb5 545 char * postQueryString;
WiredHome 12:109bf1558300 546
WiredHome 0:729320f63c5c 547 /**
WiredHome 8:262583f054f6 548 * Extract the parameter from the record, by searching for the needle in the haystack.
WiredHome 8:262583f054f6 549 *
WiredHome 8:262583f054f6 550 * The parameter of interest follows the needle, and may be ' ' delimited
WiredHome 0:729320f63c5c 551 * Can damage haystack while processing it.
WiredHome 0:729320f63c5c 552 *
WiredHome 0:729320f63c5c 553 * @param haystack is the record to search
WiredHome 0:729320f63c5c 554 * @param needle is the text to search for, which precedes the text to return
WiredHome 0:729320f63c5c 555 * @param string is the text following the needle
WiredHome 0:729320f63c5c 556 * @return true if it extracted something successfully
WiredHome 0:729320f63c5c 557 */
WiredHome 0:729320f63c5c 558 bool Extract(char * rec, char * needle, char ** string);
WiredHome 0:729320f63c5c 559
WiredHome 3:17928786bdb5 560 void SendResponse();
WiredHome 3:17928786bdb5 561 bool ParseHeader(char * bPtr);
WiredHome 3:17928786bdb5 562 bool CheckDynamicHandlers();
WiredHome 3:17928786bdb5 563
WiredHome 0:729320f63c5c 564 int HexCharToInt(char c);
WiredHome 0:729320f63c5c 565 char HexPairToChar(char * p);
WiredHome 0:729320f63c5c 566 };
WiredHome 0:729320f63c5c 567 #endif //SW_HTTPSERVER_H
WiredHome 4:f34642902056 568
WiredHome 7:99ad7a67f05e 569