Satoshi Togawa / Mbed 2 deprecated mpod_picasa_photoframe

Download picasa web albums photos 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 picasa web albums photos automatically.
This application requires mpod mother board.

Picasaウェブアルバムから、自動的に写真をダウンロードして、ディジタルフォトフレームに表示します。
動作させるには mpod マザーボード が必要です。
プログラムの中で、ご自分のアルバムのRSSファイルへのURLを指定してからご利用下さい。

album description edit information description

main.cpp@6:83383116c88a, 2012-09-01 (annotated)

Committer:
togayan
Date:
Sat Sep 01 04:28:20 2012 +0000
Revision:
6:83383116c88a
Parent:
5:66c3398a14c9 
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:dfd5cfea7112 1 #include "mbed.h"
togayan 0:dfd5cfea7112 2 #include "MSCFileSystem.h"
togayan 0:dfd5cfea7112 3 #include "EthernetInterface.h"
togayan 0:dfd5cfea7112 4 #include "HTTPClient.h"
togayan 0:dfd5cfea7112 5 #include "HTTPFile.h"
togayan 0:dfd5cfea7112 6 #include "BlinkLed.h"
togayan 5:66c3398a14c9 7 #include <cstring>
togayan 0:dfd5cfea7112 8
togayan 0:dfd5cfea7112 9 int GetFile(const char *path, const char *url);
togayan 0:dfd5cfea7112 10 int summarizeRss(const char* dstPath, const char* srcPath);
togayan 5:66c3398a14c9 11 int removeContents(const char* url);
togayan 2:531722036c0a 12 const char* getExtensionFromUrl(const char* url);
togayan 0:dfd5cfea7112 13
togayan 0:dfd5cfea7112 14 EthernetInterface eth;
togayan 0:dfd5cfea7112 15 HTTPClient http;
togayan 0:dfd5cfea7112 16 MSCFileSystem usb("usb");
togayan 6:83383116c88a 17 BlinkLed led3(LED3, 0.02);
togayan 6:83383116c88a 18 BlinkLed led4(LED4, 0.2);
togayan 0:dfd5cfea7112 19 BlinkLed ethGreen(p26, 0.02);
togayan 0:dfd5cfea7112 20 BlinkLed ethYellow(p25, 0.2);
togayan 0:dfd5cfea7112 21 DigitalOut fsusb30s(p9);
togayan 0:dfd5cfea7112 22
togayan 0:dfd5cfea7112 23 /***** Please specify "albumRssUrl" *****/
togayan 0:dfd5cfea7112 24 const char* albumRssUrl = "http://picasaweb.google.com/data/feed/base/user/*****/albumid/*****?alt=rss&kind=photo&authkey=*****&hl=ja";
togayan 3:ffbb2b22099a 25
togayan 0:dfd5cfea7112 26 const char* albumRssPath = "/usb/album.xml";
togayan 5:66c3398a14c9 27 const char* summaryPath = "/usb/summary.txt";
togayan 5:66c3398a14c9 28 const char* contentsFolder = "/usb/DCIM";
togayan 0:dfd5cfea7112 29
togayan 0:dfd5cfea7112 30 int main()
togayan 0:dfd5cfea7112 31 {
togayan 5:66c3398a14c9 32 puts("");
togayan 5:66c3398a14c9 33 puts("================================");
togayan 5:66c3398a14c9 34 puts("mpod Picasa Photo frame");
togayan 5:66c3398a14c9 35 puts("================================\n");
togayan 0:dfd5cfea7112 36
togayan 3:ffbb2b22099a 37 // Check albumRssUrl
togayan 3:ffbb2b22099a 38 if(NULL != strstr(albumRssUrl, "*****"))
togayan 3:ffbb2b22099a 39 {
togayan 3:ffbb2b22099a 40 error("[ERROR] Please specify the RSS of YOUR album to \"albumRssUrl\" in the firmware.\n");
togayan 3:ffbb2b22099a 41 }
togayan 3:ffbb2b22099a 42 if(NULL != strstr(albumRssUrl, "https"))
togayan 3:ffbb2b22099a 43 {
togayan 3:ffbb2b22099a 44 error("[ERROR] Please specify the URL of the RSS in \"HTTP\" format.\n");
togayan 3:ffbb2b22099a 45 }
togayan 3:ffbb2b22099a 46
togayan 5:66c3398a14c9 47 // Indicate downloading
togayan 6:83383116c88a 48 led4.startBlink();
togayan 5:66c3398a14c9 49 ethYellow.startBlink();
togayan 5:66c3398a14c9 50
togayan 0:dfd5cfea7112 51 // FSUSB30 switches to HSD1 (mbed)
togayan 5:66c3398a14c9 52 puts("USB host was switched to HSD1(mbed).\n");
togayan 0:dfd5cfea7112 53 fsusb30s = 0; // HSD1
togayan 0:dfd5cfea7112 54
togayan 0:dfd5cfea7112 55 // Network setup
togayan 5:66c3398a14c9 56 puts("Setup EtherNet with DHCP.");
togayan 0:dfd5cfea7112 57 eth.init(); //Use DHCP
togayan 0:dfd5cfea7112 58 eth.connect();
togayan 5:66c3398a14c9 59 printf("IP Address is %s\n\n", eth.getIPAddress());
togayan 0:dfd5cfea7112 60
togayan 0:dfd5cfea7112 61 // Obtain original lastBuildDate
togayan 5:66c3398a14c9 62 char lastBuildDateOriginal[40] = {0};
togayan 5:66c3398a14c9 63 FILE* fpOriginal = fopen(summaryPath, "r");
togayan 5:66c3398a14c9 64 if (fpOriginal == NULL)
togayan 0:dfd5cfea7112 65 {
togayan 5:66c3398a14c9 66 strcpy(lastBuildDateOriginal, "No summary.txt in USB memory");
togayan 5:66c3398a14c9 67 }
togayan 5:66c3398a14c9 68 else
togayan 5:66c3398a14c9 69 {
togayan 5:66c3398a14c9 70 if(fgets(lastBuildDateOriginal, 40, fpOriginal) == NULL)
togayan 0:dfd5cfea7112 71 {
togayan 5:66c3398a14c9 72 strcpy(lastBuildDateOriginal, "No \"lastBuildDate\" in RSS");
togayan 0:dfd5cfea7112 73 }
togayan 0:dfd5cfea7112 74 else
togayan 0:dfd5cfea7112 75 {
togayan 5:66c3398a14c9 76 lastBuildDateOriginal[strlen(lastBuildDateOriginal) - 1] = '\0';
togayan 0:dfd5cfea7112 77 }
togayan 5:66c3398a14c9 78 fclose(fpOriginal);
togayan 0:dfd5cfea7112 79 }
togayan 0:dfd5cfea7112 80 printf("\nlastBuildDate (original): %s\n", lastBuildDateOriginal);
togayan 0:dfd5cfea7112 81
togayan 0:dfd5cfea7112 82 // Download Album
togayan 0:dfd5cfea7112 83 GetFile(albumRssPath, albumRssUrl);
togayan 0:dfd5cfea7112 84
togayan 0:dfd5cfea7112 85 // Summarize RSS
togayan 5:66c3398a14c9 86 summarizeRss(summaryPath, albumRssPath);
togayan 0:dfd5cfea7112 87
togayan 5:66c3398a14c9 88 // Obtain current lastBuildDate
togayan 5:66c3398a14c9 89 char lastBuildDateCurrent[40] = {0};
togayan 5:66c3398a14c9 90 FILE* fpCurrent = fopen(summaryPath, "r");
togayan 5:66c3398a14c9 91 if (fpCurrent == NULL)
togayan 0:dfd5cfea7112 92 {
togayan 0:dfd5cfea7112 93 fsusb30s = 1; // HSD2
togayan 5:66c3398a14c9 94 error("No current summary.txt in USB memory.\n");
togayan 0:dfd5cfea7112 95 }
togayan 5:66c3398a14c9 96 else
togayan 0:dfd5cfea7112 97 {
togayan 5:66c3398a14c9 98 if(fgets(lastBuildDateCurrent, 40, fpCurrent) == NULL)
togayan 5:66c3398a14c9 99 {
togayan 5:66c3398a14c9 100 fsusb30s = 1; // HSD2
togayan 5:66c3398a14c9 101 error("No \"lastBuildDate\" element in current RSS.\n");
togayan 5:66c3398a14c9 102 }
togayan 5:66c3398a14c9 103 else
togayan 5:66c3398a14c9 104 {
togayan 5:66c3398a14c9 105 lastBuildDateCurrent[strlen(lastBuildDateCurrent) - 1] = '\0';
togayan 5:66c3398a14c9 106 }
togayan 0:dfd5cfea7112 107 }
togayan 0:dfd5cfea7112 108 printf("\nlastBuildDate (current) : %s\n", lastBuildDateCurrent);
togayan 0:dfd5cfea7112 109
togayan 3:ffbb2b22099a 110 // Determine the necessity of downloading new Photos.
togayan 3:ffbb2b22099a 111 bool flgDownloadPhoto = false;
togayan 3:ffbb2b22099a 112 if ( strcmp(lastBuildDateOriginal, lastBuildDateCurrent) == 0 )
togayan 3:ffbb2b22099a 113 {
togayan 5:66c3398a14c9 114 puts("lastBuildDate (original) == lastBuildDate (current)");
togayan 5:66c3398a14c9 115 if(NULL == opendir(contentsFolder)) // check an existance of DCIM folder
togayan 3:ffbb2b22099a 116 {
togayan 3:ffbb2b22099a 117 printf("However, no DCIM folder in USB memory\n");
togayan 3:ffbb2b22099a 118 flgDownloadPhoto = true;
togayan 3:ffbb2b22099a 119 }
togayan 3:ffbb2b22099a 120 else
togayan 3:ffbb2b22099a 121 {
togayan 3:ffbb2b22099a 122 //Should be checked whether files exist.
togayan 3:ffbb2b22099a 123 flgDownloadPhoto = false;
togayan 3:ffbb2b22099a 124 }
togayan 3:ffbb2b22099a 125 }
togayan 3:ffbb2b22099a 126 else
togayan 0:dfd5cfea7112 127 {
togayan 5:66c3398a14c9 128 puts("lastBuildDate (original) != lastBuildDate (current)");
togayan 3:ffbb2b22099a 129 flgDownloadPhoto = true;
togayan 3:ffbb2b22099a 130 }
togayan 3:ffbb2b22099a 131
togayan 3:ffbb2b22099a 132 // Download new Photos
togayan 3:ffbb2b22099a 133 if(flgDownloadPhoto)
togayan 3:ffbb2b22099a 134 {
togayan 5:66c3398a14c9 135 if(removeContents(contentsFolder) < 0)
togayan 2:531722036c0a 136 {
togayan 5:66c3398a14c9 137 mkdir(contentsFolder, 0777);
togayan 2:531722036c0a 138 }
togayan 2:531722036c0a 139
togayan 5:66c3398a14c9 140 char photoUrl[128] = {0};
togayan 5:66c3398a14c9 141 char photoPath[24] = {0};
togayan 2:531722036c0a 142 int photoNo = 1;
togayan 5:66c3398a14c9 143 while(fgets(photoUrl, 128, fpCurrent) != NULL)
togayan 2:531722036c0a 144 {
togayan 5:66c3398a14c9 145 photoUrl[strlen(photoUrl) - 1] = '\0';
togayan 5:66c3398a14c9 146 sprintf(photoPath, "%s/%08d.%s", contentsFolder, photoNo, getExtensionFromUrl(photoUrl));
togayan 2:531722036c0a 147 GetFile(photoPath, photoUrl);
togayan 2:531722036c0a 148 ++photoNo;
togayan 2:531722036c0a 149 }
togayan 2:531722036c0a 150 }
togayan 5:66c3398a14c9 151 fclose(fpCurrent);
togayan 0:dfd5cfea7112 152
togayan 0:dfd5cfea7112 153 // Wait for the completion of writing to USB Mass Storage Device.
togayan 0:dfd5cfea7112 154 wait(1);
togayan 0:dfd5cfea7112 155
togayan 0:dfd5cfea7112 156 // FSUSB30 switches to HSD2 (External Device)
togayan 5:66c3398a14c9 157 puts("\nUSB host was switched to HSD2(External Device).\n");
togayan 0:dfd5cfea7112 158 fsusb30s = 1; // HSD2
togayan 0:dfd5cfea7112 159
togayan 5:66c3398a14c9 160 // Indicate finish downloading
togayan 6:83383116c88a 161 led4.finishBlink();
togayan 5:66c3398a14c9 162 ethYellow.finishBlink();
togayan 6:83383116c88a 163 led3.startBlink();
togayan 0:dfd5cfea7112 164 ethGreen.startBlink();
togayan 0:dfd5cfea7112 165
togayan 0:dfd5cfea7112 166 while(true){}
togayan 0:dfd5cfea7112 167 }
togayan 0:dfd5cfea7112 168
togayan 0:dfd5cfea7112 169 int GetFile(const char *path, const char *url)
togayan 0:dfd5cfea7112 170 {
togayan 5:66c3398a14c9 171 printf("Getting %s -> %s\n", url, path);
togayan 0:dfd5cfea7112 172
togayan 0:dfd5cfea7112 173 HTTPFile file(path);
togayan 0:dfd5cfea7112 174 HTTPResult retGet = http.get(url, &file);
togayan 0:dfd5cfea7112 175 if (retGet != HTTP_OK)
togayan 0:dfd5cfea7112 176 {
togayan 0:dfd5cfea7112 177 fsusb30s = 1; // HSD2
togayan 0:dfd5cfea7112 178 error("Error in http.get in GetFile(): %d\n", retGet);
togayan 0:dfd5cfea7112 179 }
togayan 0:dfd5cfea7112 180 file.clear();
togayan 0:dfd5cfea7112 181
togayan 0:dfd5cfea7112 182 return (0);
togayan 0:dfd5cfea7112 183 }
togayan 0:dfd5cfea7112 184
togayan 5:66c3398a14c9 185 int summarizeRss(const char* dstPath, const char* srcPath)
togayan 0:dfd5cfea7112 186 {
togayan 5:66c3398a14c9 187 puts("Summarizing RSS.");
togayan 5:66c3398a14c9 188
togayan 0:dfd5cfea7112 189 FILE* fpSrc = fopen(srcPath, "r");
togayan 0:dfd5cfea7112 190 if (fpSrc == NULL)
togayan 0:dfd5cfea7112 191 {
togayan 0:dfd5cfea7112 192 return -1;
togayan 0:dfd5cfea7112 193 }
togayan 0:dfd5cfea7112 194
togayan 0:dfd5cfea7112 195 FILE* fpDst = fopen(dstPath, "w");
togayan 0:dfd5cfea7112 196 if (fpDst == NULL)
togayan 0:dfd5cfea7112 197 {
togayan 5:66c3398a14c9 198 fclose(fpSrc);
togayan 0:dfd5cfea7112 199 return -1;
togayan 0:dfd5cfea7112 200 }
togayan 0:dfd5cfea7112 201
togayan 5:66c3398a14c9 202 char buff[1024] = {0};
togayan 5:66c3398a14c9 203 char* buffPos = buff;
togayan 5:66c3398a14c9 204
togayan 5:66c3398a14c9 205 int present;
togayan 0:dfd5cfea7112 206 int previous = '\0';
togayan 5:66c3398a14c9 207 while( (present = fgetc(fpSrc)) != EOF )
togayan 0:dfd5cfea7112 208 {
togayan 5:66c3398a14c9 209 if(previous == '>' && present == '<')
togayan 0:dfd5cfea7112 210 {
togayan 5:66c3398a14c9 211 if( strncmp(buff, "<lastBuildDate", 14) == 0 )
togayan 5:66c3398a14c9 212 {
togayan 5:66c3398a14c9 213 *strchr(buff + 15, '<') = '\0';
togayan 5:66c3398a14c9 214 fprintf(fpDst, "%s\n", buff + 15);
togayan 5:66c3398a14c9 215 }
togayan 5:66c3398a14c9 216 else if( strncmp(buff, "<enclosure", 10) == 0 )
togayan 5:66c3398a14c9 217 {
togayan 5:66c3398a14c9 218 *strchr(buff + 34, '\'') = '\0';
togayan 5:66c3398a14c9 219 fprintf(fpDst, "%s\n", buff + 34);
togayan 5:66c3398a14c9 220 }
togayan 5:66c3398a14c9 221 buffPos = buff;
togayan 0:dfd5cfea7112 222 }
togayan 5:66c3398a14c9 223 *buffPos++ = present;
togayan 5:66c3398a14c9 224 previous = present;
togayan 0:dfd5cfea7112 225 }
togayan 0:dfd5cfea7112 226
togayan 0:dfd5cfea7112 227 fclose(fpDst);
togayan 0:dfd5cfea7112 228 fclose(fpSrc);
togayan 0:dfd5cfea7112 229
togayan 0:dfd5cfea7112 230 return 0;
togayan 0:dfd5cfea7112 231 }
togayan 0:dfd5cfea7112 232
togayan 5:66c3398a14c9 233 int removeContents(const char* dirName)
togayan 0:dfd5cfea7112 234 {
togayan 5:66c3398a14c9 235 if(DirHandle* dir = opendir(dirName))
togayan 2:531722036c0a 236 {
togayan 2:531722036c0a 237 int ret = 0;
togayan 2:531722036c0a 238 while(struct dirent* ent = dir->readdir())
togayan 2:531722036c0a 239 {
togayan 2:531722036c0a 240 char filename[32] = {0};
togayan 5:66c3398a14c9 241 sprintf(filename, "%s/%s", dirName, ent->d_name);
togayan 2:531722036c0a 242 printf("remove %s\n", filename);
togayan 2:531722036c0a 243 remove(filename);
togayan 2:531722036c0a 244 ++ret;
togayan 2:531722036c0a 245 }
togayan 2:531722036c0a 246 return ret;
togayan 2:531722036c0a 247 }
togayan 2:531722036c0a 248 else
togayan 2:531722036c0a 249 {
togayan 2:531722036c0a 250 return -1;
togayan 2:531722036c0a 251 }
togayan 2:531722036c0a 252 }
togayan 2:531722036c0a 253
togayan 2:531722036c0a 254 const char* getExtensionFromUrl(const char* url)
togayan 2:531722036c0a 255 {
togayan 2:531722036c0a 256 const char* tail = url;
togayan 2:531722036c0a 257 while('\0' != *tail)
togayan 2:531722036c0a 258 {
togayan 2:531722036c0a 259 ++tail;
togayan 2:531722036c0a 260 }
togayan 2:531722036c0a 261
togayan 2:531722036c0a 262 for(const char* p = tail; p >= url; --p)
togayan 2:531722036c0a 263 {
togayan 2:531722036c0a 264 if ('/' == *p)
togayan 2:531722036c0a 265 {
togayan 2:531722036c0a 266 return tail;
togayan 2:531722036c0a 267 }
togayan 2:531722036c0a 268 if ( '.' == *p )
togayan 2:531722036c0a 269 {
togayan 2:531722036c0a 270 return p+1;
togayan 2:531722036c0a 271 }
togayan 2:531722036c0a 272 }
togayan 2:531722036c0a 273 return tail;
togayan 2:531722036c0a 274 }