Satoshi Togawa / Mbed 2 deprecated mpod_nhk_english_spxml

Download NHK English news podcast automatically. XML Parser "spxml" is used. This application requires mpod mother board. See also http://mbed.org/users/geodenx/notebook/mpod/

Dependencies:   BlinkLed HTTPClient EthernetInterface FatFileSystemCpp MSCFileSystem spxml mbed-rtos mbed

Fork of mpod_nhk_english by Satoshi Togawa

Download NHK English news podcast automatically.
XML Parser "spxml" is used.
This application requires mpod mother board.
See also http://mbed.org/users/geodenx/notebook/mpod/

main.cpp@7:ad9fcf0e1bc5, 2012-09-01 (annotated)

Committer:
togayan
Date:
Sat Sep 01 04:09:48 2012 +0000
Revision:
7:ad9fcf0e1bc5
Parent:
6:84749589b532
Child:
8:a9541e8897f5
HTTPFile was changed to follow the latest HTTPClient library.; BlinkLed was isolated as a library.; Change LED port from LED1,2 to LED3,4 for the specification of pwmout.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
togayan 0:1855a008f28e 1 #include "mbed.h"
togayan 0:1855a008f28e 2 #include "MSCFileSystem.h"
togayan 0:1855a008f28e 3 #include "EthernetInterface.h"
togayan 0:1855a008f28e 4 #include "HTTPClient.h"
togayan 0:1855a008f28e 5 #include "HTTPFile.h"
togayan 0:1855a008f28e 6 #include "BlinkLed.h"
togayan 4:7dae52cf560f 7 #include "spdomparser.hpp"
togayan 4:7dae52cf560f 8 #include "spxmlnode.hpp"
togayan 4:7dae52cf560f 9 #include "spxmlhandle.hpp"
togayan 0:1855a008f28e 10
togayan 0:1855a008f28e 11 int GetFile(const char *path, const char *url);
togayan 0:1855a008f28e 12
togayan 0:1855a008f28e 13 EthernetInterface eth;
togayan 0:1855a008f28e 14 HTTPClient http;
togayan 0:1855a008f28e 15 MSCFileSystem usb("usb");
togayan 7:ad9fcf0e1bc5 16 BlinkLed led3(LED1, 0.02);
togayan 7:ad9fcf0e1bc5 17 BlinkLed led4(LED2, 0.2);
togayan 3:07562878d3c3 18 BlinkLed ethGreen(p26, 0.02);
togayan 3:07562878d3c3 19 BlinkLed ethYellow(p25, 0.2);
togayan 0:1855a008f28e 20 DigitalOut fsusb30s(p9);
togayan 0:1855a008f28e 21
togayan 0:1855a008f28e 22 const char* rssUrl = "http://www3.nhk.or.jp/rj/podcast/rss/english.xml";
togayan 0:1855a008f28e 23 const char* rssPath = "/usb/english.xml";
togayan 0:1855a008f28e 24 const char* mp3Path = "/usb/english.mp3";
togayan 0:1855a008f28e 25
togayan 0:1855a008f28e 26 int main()
togayan 0:1855a008f28e 27 {
togayan 5:e87211ff9c23 28 printf("\n\n===========================================\n");
togayan 5:e87211ff9c23 29 printf("mpod NHK English news Downloader with spxml\n");
togayan 5:e87211ff9c23 30 printf("===========================================\n\n");
togayan 0:1855a008f28e 31
togayan 7:ad9fcf0e1bc5 32 // Indicate downloading
togayan 7:ad9fcf0e1bc5 33 led4.startBlink();
togayan 7:ad9fcf0e1bc5 34 ethYellow.startBlink();
togayan 7:ad9fcf0e1bc5 35
togayan 0:1855a008f28e 36 // FSUSB30 switches to HSD1 (mbed)
togayan 1:1637e625b21b 37 printf("USB host was switched to HSD1(mbed).\n\n");
togayan 1:1637e625b21b 38 fsusb30s = 0; // HSD1
togayan 0:1855a008f28e 39
togayan 0:1855a008f28e 40 // Network setup
togayan 0:1855a008f28e 41 printf("Setup EtherNet with DHCP.\n");
togayan 0:1855a008f28e 42 eth.init(); //Use DHCP
togayan 0:1855a008f28e 43 eth.connect();
togayan 0:1855a008f28e 44
togayan 1:1637e625b21b 45 // Obtain original lastBuildDate
togayan 3:07562878d3c3 46 char lastBuildDateOriginal[128] = {0};
togayan 0:1855a008f28e 47 {
togayan 5:e87211ff9c23 48 FILE * fpOriginal = fopen ( rssPath, "r" );
togayan 5:e87211ff9c23 49 if( NULL == fpOriginal ) {
togayan 5:e87211ff9c23 50 printf( "cannot not open %s\n", rssPath );
togayan 5:e87211ff9c23 51 sprintf(lastBuildDateOriginal, "cannot not open original %s", rssPath );
togayan 5:e87211ff9c23 52 }
togayan 5:e87211ff9c23 53 else
togayan 2:0da3a4508b46 54 {
togayan 5:e87211ff9c23 55 fseek(fpOriginal, 0, SEEK_END); // seek to end of file
togayan 5:e87211ff9c23 56 unsigned int size = ftell(fpOriginal);
togayan 5:e87211ff9c23 57 fseek(fpOriginal, 0, SEEK_SET); // seek to head of file
togayan 5:e87211ff9c23 58
togayan 5:e87211ff9c23 59 char * source = NULL;
togayan 5:e87211ff9c23 60 source = ( char * ) malloc ( size + 1 );
togayan 5:e87211ff9c23 61 fread ( source, size, sizeof ( char ), fpOriginal );
togayan 5:e87211ff9c23 62 fclose ( fpOriginal );
togayan 5:e87211ff9c23 63 source[ size ] = 0;
togayan 5:e87211ff9c23 64
togayan 5:e87211ff9c23 65 SP_XmlDomParser parser;
togayan 5:e87211ff9c23 66 parser.append( source, strlen( source ) );
togayan 5:e87211ff9c23 67 free( source );
togayan 5:e87211ff9c23 68
togayan 5:e87211ff9c23 69 SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
togayan 5:e87211ff9c23 70
togayan 5:e87211ff9c23 71 SP_XmlCDataNode * lastBuildDateNode = rootHandle.getChild( "channel" ).getChild( "lastBuildDate" ).getChild(0).toCData();
togayan 5:e87211ff9c23 72 if( NULL != lastBuildDateNode )
togayan 5:e87211ff9c23 73 {
togayan 5:e87211ff9c23 74 strcpy(lastBuildDateOriginal, lastBuildDateNode->getText());
togayan 5:e87211ff9c23 75 } else {
togayan 6:84749589b532 76 sprintf(lastBuildDateOriginal, "Cannot found /rss/channel/lastBuildDate");
togayan 5:e87211ff9c23 77 }
togayan 2:0da3a4508b46 78 }
togayan 0:1855a008f28e 79 }
togayan 3:07562878d3c3 80 printf("\nlastBuildDate (original): %s\n", lastBuildDateOriginal);
togayan 0:1855a008f28e 81
togayan 1:1637e625b21b 82 // Download RSS
togayan 0:1855a008f28e 83 GetFile(rssPath, rssUrl);
togayan 1:1637e625b21b 84
togayan 1:1637e625b21b 85 // Obtain current lastBuildDate
togayan 3:07562878d3c3 86 char lastBuildDateCurrent[128] = {0};
togayan 3:07562878d3c3 87 char mp3Url[256] = {0};
togayan 3:07562878d3c3 88 char mp3Length[32] = {0};
togayan 0:1855a008f28e 89 {
togayan 5:e87211ff9c23 90 FILE * fpCurrent = fopen ( rssPath, "r" );
togayan 5:e87211ff9c23 91 if( NULL == fpCurrent ) {
togayan 2:0da3a4508b46 92 fsusb30s = 1; // HSD2
togayan 2:0da3a4508b46 93 error("No current english.xml in USB memory.\n");
togayan 2:0da3a4508b46 94 }
togayan 5:e87211ff9c23 95 else
togayan 2:0da3a4508b46 96 {
togayan 5:e87211ff9c23 97 fseek(fpCurrent, 0, SEEK_END); // seek to end of file
togayan 5:e87211ff9c23 98 unsigned int size = ftell(fpCurrent);
togayan 5:e87211ff9c23 99 fseek(fpCurrent, 0, SEEK_SET); // seek to head of file
togayan 5:e87211ff9c23 100
togayan 5:e87211ff9c23 101 char * source = NULL;
togayan 5:e87211ff9c23 102 source = ( char * ) malloc ( size + 1 );
togayan 5:e87211ff9c23 103 fread ( source, size, sizeof ( char ), fpCurrent );
togayan 5:e87211ff9c23 104 fclose ( fpCurrent );
togayan 5:e87211ff9c23 105 source[ size ] = 0;
togayan 5:e87211ff9c23 106
togayan 5:e87211ff9c23 107 SP_XmlDomParser parser;
togayan 5:e87211ff9c23 108 parser.append( source, strlen( source ) );
togayan 5:e87211ff9c23 109 free( source );
togayan 5:e87211ff9c23 110
togayan 5:e87211ff9c23 111 SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
togayan 5:e87211ff9c23 112
togayan 5:e87211ff9c23 113 SP_XmlCDataNode * lastBuildDateNode = rootHandle.getChild( "channel" ).getChild( "lastBuildDate" ).getChild(0).toCData();
togayan 5:e87211ff9c23 114 if( NULL != lastBuildDateNode )
togayan 5:e87211ff9c23 115 {
togayan 5:e87211ff9c23 116 strcpy(lastBuildDateCurrent, lastBuildDateNode->getText());
togayan 5:e87211ff9c23 117 } else {
togayan 5:e87211ff9c23 118 fsusb30s = 1; // HSD2
togayan 5:e87211ff9c23 119 error("No \"lastBuildDate\" element in current RSS.\n");
togayan 5:e87211ff9c23 120 }
togayan 5:e87211ff9c23 121
togayan 5:e87211ff9c23 122 SP_XmlElementNode * enclosureNode = rootHandle.getChild( "channel" ).getChild( "item" ).getChild("enclosure").toElement();
togayan 5:e87211ff9c23 123 if( NULL != enclosureNode )
togayan 5:e87211ff9c23 124 {
togayan 5:e87211ff9c23 125 strcpy(mp3Url, enclosureNode->getAttrValue("url"));
togayan 5:e87211ff9c23 126 strcpy(mp3Length, enclosureNode->getAttrValue("length"));
togayan 5:e87211ff9c23 127 } else {
togayan 5:e87211ff9c23 128 fsusb30s = 1; // HSD2
togayan 5:e87211ff9c23 129 error("No \"lastBuildDate\" element in current RSS.\n");
togayan 5:e87211ff9c23 130 }
togayan 5:e87211ff9c23 131
togayan 2:0da3a4508b46 132 }
togayan 0:1855a008f28e 133 }
togayan 3:07562878d3c3 134 printf("\nlastBuildDate (current) : %s\n", lastBuildDateCurrent);
togayan 0:1855a008f28e 135
togayan 2:0da3a4508b46 136 // Determine the necessity of downloading new MP3.
togayan 2:0da3a4508b46 137 bool flgDownloadMp3 = false;
togayan 3:07562878d3c3 138 if ( strcmp(lastBuildDateOriginal, lastBuildDateCurrent) == 0 )
togayan 0:1855a008f28e 139 {
togayan 3:07562878d3c3 140 printf("lastBuildDate (original) == lastBuildDate (current)\n");
togayan 0:1855a008f28e 141 FILE* mp3fp = fopen(mp3Path, "r"); // check an existance of english.mp3
togayan 0:1855a008f28e 142 if (mp3fp != NULL)
togayan 0:1855a008f28e 143 {
togayan 2:0da3a4508b46 144 fseek(mp3fp, 0, SEEK_END); // seek to end of file
togayan 3:07562878d3c3 145 if (ftell(mp3fp) != atol(mp3Length))
togayan 2:0da3a4508b46 146 {
togayan 3:07562878d3c3 147 printf("MP3 file size is invalid.\n");
togayan 2:0da3a4508b46 148 flgDownloadMp3 = true;
togayan 2:0da3a4508b46 149 }
togayan 0:1855a008f28e 150 fclose(mp3fp);
togayan 0:1855a008f28e 151 }
togayan 0:1855a008f28e 152 else
togayan 0:1855a008f28e 153 {
togayan 3:07562878d3c3 154 printf("However, no enlish.mp3 in USB memory\n");
togayan 2:0da3a4508b46 155 flgDownloadMp3 = true;
togayan 0:1855a008f28e 156 }
togayan 0:1855a008f28e 157 }
togayan 0:1855a008f28e 158 else
togayan 0:1855a008f28e 159 {
togayan 3:07562878d3c3 160 printf("lastBuildDate (original) != lastBuildDate (current)\n");
togayan 2:0da3a4508b46 161 flgDownloadMp3 = true;
togayan 0:1855a008f28e 162 }
togayan 0:1855a008f28e 163
togayan 2:0da3a4508b46 164 // Download new MP3
togayan 2:0da3a4508b46 165 if(flgDownloadMp3 == true)
togayan 2:0da3a4508b46 166 {
togayan 3:07562878d3c3 167 GetFile(mp3Path, mp3Url);
togayan 2:0da3a4508b46 168 }
togayan 2:0da3a4508b46 169
togayan 2:0da3a4508b46 170 // Wait for the completion of writing to USB Mass Storage Device.
togayan 2:0da3a4508b46 171 wait(1);
togayan 2:0da3a4508b46 172
togayan 1:1637e625b21b 173 // FSUSB30 switches to HSD2 (External Device)
togayan 3:07562878d3c3 174 printf("\nUSB host was switched to HSD2(External Device).\n");
togayan 1:1637e625b21b 175 fsusb30s = 1; // HSD2
togayan 0:1855a008f28e 176
togayan 7:ad9fcf0e1bc5 177 // Indicate finish downloading
togayan 7:ad9fcf0e1bc5 178 led4.finishBlink();
togayan 7:ad9fcf0e1bc5 179 ethYellow.finishBlink();
togayan 7:ad9fcf0e1bc5 180 led3.startBlink();
togayan 3:07562878d3c3 181 ethGreen.startBlink();
togayan 0:1855a008f28e 182
togayan 0:1855a008f28e 183 while(true){}
togayan 0:1855a008f28e 184 }
togayan 0:1855a008f28e 185
togayan 0:1855a008f28e 186 int GetFile(const char *path, const char *url)
togayan 0:1855a008f28e 187 {
togayan 7:ad9fcf0e1bc5 188 printf("Getting %s -> %s\n", url, path);
togayan 0:1855a008f28e 189
togayan 2:0da3a4508b46 190 HTTPFile file(path);
togayan 0:1855a008f28e 191 HTTPResult retGet = http.get(url, &file);
togayan 2:0da3a4508b46 192 if (retGet != HTTP_OK)
togayan 2:0da3a4508b46 193 {
togayan 1:1637e625b21b 194 fsusb30s = 1; // HSD2
togayan 0:1855a008f28e 195 error("Error in http.get in GetFile(): %d\n", retGet);
togayan 0:1855a008f28e 196 }
togayan 0:1855a008f28e 197 file.clear();
togayan 0:1855a008f28e 198
togayan 0:1855a008f28e 199 return (0);
togayan 0:1855a008f28e 200 }