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@6:84749589b532, 2012-08-24 (annotated)

Committer:
togayan
Date:
Fri Aug 24 17:00:07 2012 +0000
Revision:
6:84749589b532
Parent:
5:e87211ff9c23
Child:
7:ad9fcf0e1bc5
Remove some printf().

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 3:07562878d3c3 16 BlinkLed led1(LED1, 0.02);
togayan 3:07562878d3c3 17 BlinkLed led2(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 Timer timer;
togayan 0:1855a008f28e 22
togayan 0:1855a008f28e 23 const char* rssUrl = "http://www3.nhk.or.jp/rj/podcast/rss/english.xml";
togayan 0:1855a008f28e 24 const char* rssPath = "/usb/english.xml";
togayan 0:1855a008f28e 25 const char* mp3Path = "/usb/english.mp3";
togayan 0:1855a008f28e 26
togayan 0:1855a008f28e 27 int main()
togayan 0:1855a008f28e 28 {
togayan 5:e87211ff9c23 29 printf("\n\n===========================================\n");
togayan 5:e87211ff9c23 30 printf("mpod NHK English news Downloader with spxml\n");
togayan 5:e87211ff9c23 31 printf("===========================================\n\n");
togayan 0:1855a008f28e 32
togayan 0:1855a008f28e 33 // FSUSB30 switches to HSD1 (mbed)
togayan 1:1637e625b21b 34 printf("USB host was switched to HSD1(mbed).\n\n");
togayan 1:1637e625b21b 35 fsusb30s = 0; // HSD1
togayan 0:1855a008f28e 36
togayan 0:1855a008f28e 37 // Network setup
togayan 0:1855a008f28e 38 printf("Setup EtherNet with DHCP.\n");
togayan 0:1855a008f28e 39 eth.init(); //Use DHCP
togayan 0:1855a008f28e 40 eth.connect();
togayan 0:1855a008f28e 41
togayan 1:1637e625b21b 42 // Obtain original lastBuildDate
togayan 3:07562878d3c3 43 char lastBuildDateOriginal[128] = {0};
togayan 0:1855a008f28e 44 {
togayan 5:e87211ff9c23 45 FILE * fpOriginal = fopen ( rssPath, "r" );
togayan 5:e87211ff9c23 46 if( NULL == fpOriginal ) {
togayan 5:e87211ff9c23 47 printf( "cannot not open %s\n", rssPath );
togayan 5:e87211ff9c23 48 sprintf(lastBuildDateOriginal, "cannot not open original %s", rssPath );
togayan 5:e87211ff9c23 49 }
togayan 5:e87211ff9c23 50 else
togayan 2:0da3a4508b46 51 {
togayan 5:e87211ff9c23 52 fseek(fpOriginal, 0, SEEK_END); // seek to end of file
togayan 5:e87211ff9c23 53 unsigned int size = ftell(fpOriginal);
togayan 5:e87211ff9c23 54 fseek(fpOriginal, 0, SEEK_SET); // seek to head of file
togayan 5:e87211ff9c23 55
togayan 5:e87211ff9c23 56 char * source = NULL;
togayan 5:e87211ff9c23 57 source = ( char * ) malloc ( size + 1 );
togayan 5:e87211ff9c23 58 fread ( source, size, sizeof ( char ), fpOriginal );
togayan 5:e87211ff9c23 59 fclose ( fpOriginal );
togayan 5:e87211ff9c23 60 source[ size ] = 0;
togayan 5:e87211ff9c23 61
togayan 5:e87211ff9c23 62 SP_XmlDomParser parser;
togayan 5:e87211ff9c23 63 parser.append( source, strlen( source ) );
togayan 5:e87211ff9c23 64 free( source );
togayan 5:e87211ff9c23 65
togayan 5:e87211ff9c23 66 SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
togayan 5:e87211ff9c23 67
togayan 5:e87211ff9c23 68 SP_XmlCDataNode * lastBuildDateNode = rootHandle.getChild( "channel" ).getChild( "lastBuildDate" ).getChild(0).toCData();
togayan 5:e87211ff9c23 69 if( NULL != lastBuildDateNode )
togayan 5:e87211ff9c23 70 {
togayan 5:e87211ff9c23 71 strcpy(lastBuildDateOriginal, lastBuildDateNode->getText());
togayan 5:e87211ff9c23 72 } else {
togayan 6:84749589b532 73 sprintf(lastBuildDateOriginal, "Cannot found /rss/channel/lastBuildDate");
togayan 5:e87211ff9c23 74 }
togayan 2:0da3a4508b46 75 }
togayan 0:1855a008f28e 76 }
togayan 3:07562878d3c3 77 printf("\nlastBuildDate (original): %s\n", lastBuildDateOriginal);
togayan 0:1855a008f28e 78
togayan 1:1637e625b21b 79 // Download RSS
togayan 0:1855a008f28e 80 GetFile(rssPath, rssUrl);
togayan 1:1637e625b21b 81
togayan 1:1637e625b21b 82 // Obtain current lastBuildDate
togayan 3:07562878d3c3 83 char lastBuildDateCurrent[128] = {0};
togayan 3:07562878d3c3 84 char mp3Url[256] = {0};
togayan 3:07562878d3c3 85 char mp3Length[32] = {0};
togayan 0:1855a008f28e 86 {
togayan 5:e87211ff9c23 87 FILE * fpCurrent = fopen ( rssPath, "r" );
togayan 5:e87211ff9c23 88 if( NULL == fpCurrent ) {
togayan 2:0da3a4508b46 89 fsusb30s = 1; // HSD2
togayan 2:0da3a4508b46 90 error("No current english.xml in USB memory.\n");
togayan 2:0da3a4508b46 91 }
togayan 5:e87211ff9c23 92 else
togayan 2:0da3a4508b46 93 {
togayan 5:e87211ff9c23 94 fseek(fpCurrent, 0, SEEK_END); // seek to end of file
togayan 5:e87211ff9c23 95 unsigned int size = ftell(fpCurrent);
togayan 5:e87211ff9c23 96 fseek(fpCurrent, 0, SEEK_SET); // seek to head of file
togayan 5:e87211ff9c23 97
togayan 5:e87211ff9c23 98 char * source = NULL;
togayan 5:e87211ff9c23 99 source = ( char * ) malloc ( size + 1 );
togayan 5:e87211ff9c23 100 fread ( source, size, sizeof ( char ), fpCurrent );
togayan 5:e87211ff9c23 101 fclose ( fpCurrent );
togayan 5:e87211ff9c23 102 source[ size ] = 0;
togayan 5:e87211ff9c23 103
togayan 5:e87211ff9c23 104 SP_XmlDomParser parser;
togayan 5:e87211ff9c23 105 parser.append( source, strlen( source ) );
togayan 5:e87211ff9c23 106 free( source );
togayan 5:e87211ff9c23 107
togayan 5:e87211ff9c23 108 SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
togayan 5:e87211ff9c23 109
togayan 5:e87211ff9c23 110 SP_XmlCDataNode * lastBuildDateNode = rootHandle.getChild( "channel" ).getChild( "lastBuildDate" ).getChild(0).toCData();
togayan 5:e87211ff9c23 111 if( NULL != lastBuildDateNode )
togayan 5:e87211ff9c23 112 {
togayan 5:e87211ff9c23 113 strcpy(lastBuildDateCurrent, lastBuildDateNode->getText());
togayan 5:e87211ff9c23 114 } else {
togayan 5:e87211ff9c23 115 fsusb30s = 1; // HSD2
togayan 5:e87211ff9c23 116 error("No \"lastBuildDate\" element in current RSS.\n");
togayan 5:e87211ff9c23 117 }
togayan 5:e87211ff9c23 118
togayan 5:e87211ff9c23 119 SP_XmlElementNode * enclosureNode = rootHandle.getChild( "channel" ).getChild( "item" ).getChild("enclosure").toElement();
togayan 5:e87211ff9c23 120 if( NULL != enclosureNode )
togayan 5:e87211ff9c23 121 {
togayan 5:e87211ff9c23 122 strcpy(mp3Url, enclosureNode->getAttrValue("url"));
togayan 5:e87211ff9c23 123 strcpy(mp3Length, enclosureNode->getAttrValue("length"));
togayan 5:e87211ff9c23 124 } else {
togayan 5:e87211ff9c23 125 fsusb30s = 1; // HSD2
togayan 5:e87211ff9c23 126 error("No \"lastBuildDate\" element in current RSS.\n");
togayan 5:e87211ff9c23 127 }
togayan 5:e87211ff9c23 128
togayan 2:0da3a4508b46 129 }
togayan 0:1855a008f28e 130 }
togayan 3:07562878d3c3 131 printf("\nlastBuildDate (current) : %s\n", lastBuildDateCurrent);
togayan 0:1855a008f28e 132
togayan 2:0da3a4508b46 133 // Determine the necessity of downloading new MP3.
togayan 2:0da3a4508b46 134 bool flgDownloadMp3 = false;
togayan 3:07562878d3c3 135 if ( strcmp(lastBuildDateOriginal, lastBuildDateCurrent) == 0 )
togayan 0:1855a008f28e 136 {
togayan 3:07562878d3c3 137 printf("lastBuildDate (original) == lastBuildDate (current)\n");
togayan 0:1855a008f28e 138 FILE* mp3fp = fopen(mp3Path, "r"); // check an existance of english.mp3
togayan 0:1855a008f28e 139 if (mp3fp != NULL)
togayan 0:1855a008f28e 140 {
togayan 2:0da3a4508b46 141 fseek(mp3fp, 0, SEEK_END); // seek to end of file
togayan 3:07562878d3c3 142 if (ftell(mp3fp) != atol(mp3Length))
togayan 2:0da3a4508b46 143 {
togayan 3:07562878d3c3 144 printf("MP3 file size is invalid.\n");
togayan 2:0da3a4508b46 145 flgDownloadMp3 = true;
togayan 2:0da3a4508b46 146 }
togayan 0:1855a008f28e 147 fclose(mp3fp);
togayan 0:1855a008f28e 148 }
togayan 0:1855a008f28e 149 else
togayan 0:1855a008f28e 150 {
togayan 3:07562878d3c3 151 printf("However, no enlish.mp3 in USB memory\n");
togayan 2:0da3a4508b46 152 flgDownloadMp3 = true;
togayan 0:1855a008f28e 153 }
togayan 0:1855a008f28e 154 }
togayan 0:1855a008f28e 155 else
togayan 0:1855a008f28e 156 {
togayan 3:07562878d3c3 157 printf("lastBuildDate (original) != lastBuildDate (current)\n");
togayan 2:0da3a4508b46 158 flgDownloadMp3 = true;
togayan 0:1855a008f28e 159 }
togayan 0:1855a008f28e 160
togayan 2:0da3a4508b46 161 // Download new MP3
togayan 2:0da3a4508b46 162 if(flgDownloadMp3 == true)
togayan 2:0da3a4508b46 163 {
togayan 3:07562878d3c3 164 GetFile(mp3Path, mp3Url);
togayan 2:0da3a4508b46 165 }
togayan 2:0da3a4508b46 166
togayan 2:0da3a4508b46 167 // Wait for the completion of writing to USB Mass Storage Device.
togayan 2:0da3a4508b46 168 wait(1);
togayan 2:0da3a4508b46 169
togayan 1:1637e625b21b 170 // FSUSB30 switches to HSD2 (External Device)
togayan 3:07562878d3c3 171 printf("\nUSB host was switched to HSD2(External Device).\n");
togayan 1:1637e625b21b 172 fsusb30s = 1; // HSD2
togayan 0:1855a008f28e 173
togayan 0:1855a008f28e 174 // blink LED
togayan 0:1855a008f28e 175 led1.startBlink();
togayan 3:07562878d3c3 176 ethGreen.startBlink();
togayan 0:1855a008f28e 177
togayan 0:1855a008f28e 178 while(true){}
togayan 0:1855a008f28e 179 }
togayan 0:1855a008f28e 180
togayan 0:1855a008f28e 181 int GetFile(const char *path, const char *url)
togayan 0:1855a008f28e 182 {
togayan 2:0da3a4508b46 183 led2.startBlink();
togayan 3:07562878d3c3 184 ethYellow.startBlink();
togayan 3:07562878d3c3 185 printf("\nGetting %s\n", url);
togayan 0:1855a008f28e 186
togayan 0:1855a008f28e 187 timer.stop();
togayan 0:1855a008f28e 188 timer.reset();
togayan 0:1855a008f28e 189 timer.start();
togayan 0:1855a008f28e 190
togayan 2:0da3a4508b46 191 HTTPFile file(path);
togayan 0:1855a008f28e 192 HTTPResult retGet = http.get(url, &file);
togayan 2:0da3a4508b46 193 if (retGet != HTTP_OK)
togayan 2:0da3a4508b46 194 {
togayan 1:1637e625b21b 195 fsusb30s = 1; // HSD2
togayan 0:1855a008f28e 196 error("Error in http.get in GetFile(): %d\n", retGet);
togayan 0:1855a008f28e 197 }
togayan 0:1855a008f28e 198 file.clear();
togayan 0:1855a008f28e 199
togayan 0:1855a008f28e 200 timer.stop();
togayan 3:07562878d3c3 201 printf("timer.read_ms(): %d\n", timer.read_ms());
togayan 2:0da3a4508b46 202
togayan 2:0da3a4508b46 203 led2.finishBlink();
togayan 3:07562878d3c3 204 ethYellow.finishBlink();
togayan 0:1855a008f28e 205 return (0);
togayan 0:1855a008f28e 206 }