FRDM-K64F Code Share
HTTP SD Card File Server for the FRDM-K64F board
Dependencies: EthernetInterface SDFileSystem mbed-rtos mbed
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HTTP_SD_Server_K64F
by 
Greg Steiert
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main.cpp
00001 #include "mbed.h" 00002 #include "EthernetInterface.h" 00003 #include "SDFileSystem.h" 00004 #include <stdio.h> 00005 #include <string.h> 00006 00007 #define HTTPD_SERVER_PORT 80 00008 #define HTTPD_MAX_REQ_LENGTH 1023 00009 #define HTTPD_MAX_HDR_LENGTH 255 00010 #define HTTPD_MAX_FNAME_LENGTH 127 00011 #define HTTPD_MAX_DNAME_LENGTH 127 00012 00013 Serial uart(USBTX, USBRX); 00014 00015 //SDFileSystem sd(p5, p6, p7, p8, "sd"); // LPC1768 MBD2PMD 00016 //SDFileSystem sd(P0_18, P0_17, P0_15, P0_16, "sd"); // Seeeduino Arch Pro SPI2SD 00017 SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); // K64F 00018 00019 EthernetInterface eth; 00020 TCPSocketServer server; 00021 TCPSocketConnection client; 00022 00023 char buffer[HTTPD_MAX_REQ_LENGTH+1]; 00024 char httpHeader[HTTPD_MAX_HDR_LENGTH+1]; 00025 char fileName[HTTPD_MAX_FNAME_LENGTH+1]; 00026 char dirName[HTTPD_MAX_DNAME_LENGTH+1]; 00027 char *uristr; 00028 char *eou; 00029 char *qrystr; 00030 00031 FILE *fp; 00032 int rdCnt; 00033 00034 void get_file(char* uri) 00035 { 00036 uart.printf("get_file %s\n", uri); 00037 char *lstchr = strrchr(uri, NULL) -1; 00038 if ('/' == *lstchr) { 00039 uart.printf("Open directory /sd%s\n", uri); 00040 *lstchr = 0; 00041 sprintf(fileName, "/sd%s", uri); 00042 DIR *d = opendir(fileName); 00043 if (d != NULL) { 00044 sprintf(httpHeader,"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: Close\r\n\r\n"); 00045 client.send(httpHeader,strlen(httpHeader)); 00046 sprintf(httpHeader,"<html><head><title>Directory Listing</title></head><body><h1>%s Directory Listing</h1><ul>", uri); 00047 client.send(httpHeader,strlen(httpHeader)); 00048 struct dirent *p; 00049 while((p = readdir(d)) != NULL) { 00050 sprintf(dirName, "%s/%s", fileName, p->d_name); 00051 uart.printf("%s\n", dirName); 00052 DIR *subDir = opendir(dirName); 00053 if (subDir != NULL) { 00054 sprintf(httpHeader,"<li><a href=\"./%s/\">%s/</a></li>", p->d_name, p->d_name); 00055 } else { 00056 sprintf(httpHeader,"<li><a href=\"./%s\">%s</a></li>", p->d_name, p->d_name); 00057 } 00058 client.send(httpHeader,strlen(httpHeader)); 00059 } 00060 } 00061 closedir(d); 00062 uart.printf("Directory closed\n"); 00063 sprintf(httpHeader,"</ul></body></html>"); 00064 client.send(httpHeader,strlen(httpHeader)); 00065 } else { 00066 sprintf(fileName, "/sd%s", uri); 00067 fp = fopen(fileName, "r"); 00068 if (fp == NULL) { 00069 uart.printf("File not found\n"); 00070 sprintf(httpHeader,"HTTP/1.1 404 Not Found \r\nContent-Type: text\r\nConnection: Close\r\n\r\n"); 00071 client.send(httpHeader,strlen(httpHeader)); 00072 client.send(uri,strlen(uri)); 00073 } else { 00074 uart.printf("Sending: header"); 00075 sprintf(httpHeader,"HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: Close\r\n\r\n"); 00076 client.send(httpHeader,strlen(httpHeader)); 00077 uart.printf(" file"); 00078 while ((rdCnt = fread(buffer, sizeof( char ), 1024, fp)) == 1024) { 00079 client.send(buffer, rdCnt); 00080 uart.printf("."); 00081 } 00082 client.send(buffer, rdCnt); 00083 fclose(fp); 00084 uart.printf("done\n"); 00085 } 00086 } 00087 } 00088 00089 int main (void) 00090 { 00091 // Serial Interface eth; 00092 uart.baud(115200); 00093 uart.printf("Initializing\n"); 00094 00095 // Check File System 00096 uart.printf("Checking File System\n"); 00097 DIR *d = opendir("/sd/"); 00098 if (d != NULL) { 00099 uart.printf("SD Card Present\n"); 00100 } else { 00101 uart.printf("SD Card Root Directory Not Found\n"); 00102 } 00103 00104 // EthernetInterface eth; 00105 uart.printf("Initializing Ethernet\n"); 00106 eth.init(); //Use DHCP 00107 uart.printf("Connecting\n"); 00108 eth.connect(); 00109 uart.printf("IP Address is %s\n", eth.getIPAddress()); 00110 00111 // TCPSocketServer server; 00112 server.bind(HTTPD_SERVER_PORT); 00113 server.listen(); 00114 uart.printf("Server Listening\n"); 00115 00116 while (true) { 00117 uart.printf("\nWait for new connection...\r\n"); 00118 server.accept(client); 00119 client.set_blocking(false, 1500); // Timeout after (1.5)s 00120 00121 uart.printf("Connection from: %s\r\n", client.get_address()); 00122 while (true) { 00123 int n = client.receive(buffer, sizeof(buffer)); 00124 if (n <= 0) break; 00125 uart.printf("Recieved Data: %d\r\n\r\n%.*s\r\n",n,n,buffer); 00126 if (n >= 1024) { 00127 sprintf(httpHeader,"HTTP/1.1 413 Request Entity Too Large \r\nContent-Type: text\r\nConnection: Close\r\n\r\n"); 00128 client.send(httpHeader,strlen(httpHeader)); 00129 client.send(buffer,n); 00130 break; 00131 } else { 00132 buffer[n]=0; 00133 } 00134 if (!strncmp(buffer, "GET ", 4)) { 00135 uristr = buffer + 4; 00136 eou = strstr(uristr, " "); 00137 if (eou == NULL) { 00138 sprintf(httpHeader,"HTTP/1.1 400 Bad Request \r\nContent-Type: text\r\nConnection: Close\r\n\r\n"); 00139 client.send(httpHeader,strlen(httpHeader)); 00140 client.send(buffer,n); 00141 } else { 00142 *eou = 0; 00143 get_file(uristr); 00144 } 00145 } 00146 } 00147 00148 client.close(); 00149 } 00150 }
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