Download NHK English news podcast automatically. This application requires mpod mother board. See also http://mbed.org/users/geodenx/notebook/mpod/
Dependencies: BlinkLed HTTPClient EthernetInterface FatFileSystemCpp MSCFileSystem mbed-rtos mbed
Download NHK English news podcast automatically. This application requires mpod mother board. See also http://mbed.org/users/geodenx/notebook/mpod/
main.cpp
- Committer:
- togayan
- Date:
- 2012-08-17
- Revision:
- 1:1637e625b21b
- Parent:
- 0:1855a008f28e
- Child:
- 2:0da3a4508b46
File content as of revision 1:1637e625b21b:
#include "mbed.h" #include "MSCFileSystem.h" #include "EthernetInterface.h" #include "HTTPClient.h" #include "HTTPFile.h" #include "BlinkLed.h" #include "tinyxml2.h" using namespace tinyxml2; int GetFile(const char *path, const char *url); EthernetInterface eth; HTTPClient http; MSCFileSystem usb("usb"); BlinkLed led1(LED1, 4); DigitalOut fsusb30s(p9); Timer timer; const char* rssUrl = "http://www3.nhk.or.jp/rj/podcast/rss/english.xml"; const char* rssPath = "/usb/english.xml"; const char* mp3Path = "/usb/english.mp3"; int main() { printf("\n\n================================\n"); printf("mpod NHK English news Downloader\n"); printf("================================\n\n"); // FSUSB30 switches to HSD1 (mbed) printf("USB host was switched to HSD1(mbed).\n\n"); fsusb30s = 0; // HSD1 // Network setup printf("Setup EtherNet with DHCP.\n"); eth.init(); //Use DHCP eth.connect(); // Obtain original lastBuildDate const char* lastBuildDateOriginal; XMLDocument docOriginal; if(XML_SUCCESS != docOriginal.LoadFile(rssPath)) { lastBuildDateOriginal = "No english.xml in USB memory"; } XMLElement* lastBuildDateOriginalElement = docOriginal.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("lastBuildDate"); if(NULL == lastBuildDateOriginalElement) { lastBuildDateOriginal = "No \"lastBuildDate\" element in RSS"; } else { lastBuildDateOriginal = lastBuildDateOriginalElement->GetText(); } // Download RSS GetFile(rssPath, rssUrl); // Obtain current lastBuildDate const char* lastBuildDateCurrent; XMLDocument docCurrent; if(XML_SUCCESS != docCurrent.LoadFile(rssPath)) { lastBuildDateCurrent = "No english.xml in USB memory"; } XMLElement* lastBuildDateCurrentElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("lastBuildDate"); if(NULL == lastBuildDateCurrentElement) { lastBuildDateCurrent = "No \"lastBuildDate\" element in RSS"; } else { lastBuildDateCurrent = lastBuildDateCurrentElement->GetText(); } printf("\n"); printf("lastBuildDate (original): %s\n", lastBuildDateOriginal); printf("lastBuildDate (current) : %s\n", lastBuildDateCurrent); // Download new MP3 if (strcmp(lastBuildDateOriginal, lastBuildDateCurrent) == 0) { printf("lastBuildDate (original) == lastBuildDate (current)\n"); FILE* mp3fp = fopen(mp3Path, "r"); // check an existance of english.mp3 if (mp3fp != NULL) { fclose(mp3fp); } else { printf("However, no enlish.mp3 in USB memory\n"); } } else { printf("lastBuildDate (original) != lastBuildDate (current)\n"); XMLElement* enclosureElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("item")->FirstChildElement("enclosure"); if(NULL == enclosureElement) { printf("No \"enclosure\" element in RSS"); } else { const char* mp3Url = enclosureElement->Attribute( "url" ); GetFile(mp3Path, mp3Url); } } // FSUSB30 switches to HSD2 (External Device) printf("\nUSB host was switched to HSD2(External Device).\n"); fsusb30s = 1; // HSD2 // blink LED led1.startBlink(); while(true){} } int GetFile(const char *path, const char *url) { HTTPFile file(path); printf("\nGetting %s\n", url); timer.stop(); timer.reset(); timer.start(); HTTPResult retGet = http.get(url, &file); if (retGet != HTTP_OK) { // FSUSB30 switches to HSD2 (External Device) printf("USB host was switched to HSD2(External Device).\n"); fsusb30s = 1; // HSD2 error("Error in http.get in GetFile(): %d\n", retGet); } file.clear(); timer.stop(); printf("timer.read_ms(): %d\n", timer.read_ms()); return (0); }