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

Diff: main.cpp

Revision:
2:531722036c0a
Parent:
0:dfd5cfea7112
Child:
3:ffbb2b22099a
--- a/main.cpp	Thu Aug 23 14:10:58 2012 +0000
+++ b/main.cpp	Fri Aug 24 13:07:06 2012 +0000
@@ -11,6 +11,8 @@
 int GetFile(const char *path, const char *url);
 int addNewLine(const char* dstPath, const char* srcPath);
 int summarizeRss(const char* dstPath, const char* srcPath);
+int removePhotos();
+const char* getExtensionFromUrl(const char* url);
 
 EthernetInterface eth;
 HTTPClient http;
@@ -24,7 +26,6 @@
 
 /***** Please specify "albumRssUrl" *****/
 const char* albumRssUrl  = "http://picasaweb.google.com/data/feed/base/user/*****/albumid/*****?alt=rss&kind=photo&authkey=*****&hl=ja";
-
 const char* albumRssPath = "/usb/album.xml";
 const char* tempPath     = "/usb/temp.xml";
 const char* summaryPath  = "/usb/summary.xml";
@@ -93,27 +94,41 @@
     strcpy(lastBuildDateCurrent, lastBuildDateCurrentElement->GetText());
     printf("\nlastBuildDate (current) : %s\n", lastBuildDateCurrent);
     
-    
-    char photoUrl[256] = {0};
-    char photoPath[32] = {0};
-    int photoNo = 1;
-    XMLElement* itemElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("item");
-    if(NULL == itemElement)
+    if( strcmp(lastBuildDateOriginal, lastBuildDateCurrent) != 0 )
     {
-        fsusb30s = 1; // HSD2
-        error("No \"enclosure\" element in current RSS.\n");
-    }
-    strcpy(photoUrl, itemElement->FirstChildElement("enclosure")->Attribute("url"));
-    sprintf(photoPath, "/usb/DCIM/%08d.jpg", photoNo);
-    GetFile(photoPath, photoUrl);
-    ++photoNo;
-
-    while( (itemElement = itemElement->NextSiblingElement( "item" ) ) != NULL )
-    {
+        printf("lastBuildDate (original) != lastBuildDate (current)\n");
+        if(removePhotos() < 0)
+        {
+            fsusb30s = 1; // HSD2
+            error("No \"DCIM\" folder in MSD.\n");
+        }
+    
+        char photoUrl[256] = {0};
+        char photoPath[32] = {0};
+        int photoNo = 1;
+        XMLElement* itemElement = docCurrent.FirstChildElement("rss")->FirstChildElement("channel")->FirstChildElement("item");
+        if(NULL == itemElement)
+        {
+            fsusb30s = 1; // HSD2
+            error("No \"enclosure\" element in current RSS.\n");
+        }
         strcpy(photoUrl, itemElement->FirstChildElement("enclosure")->Attribute("url"));
-        sprintf(photoPath, "/usb/DCIM/%08d.jpg", photoNo);
+        const char* extension = getExtensionFromUrl(photoUrl);
+        sprintf(photoPath, "/usb/DCIM/%08d.%s", photoNo, extension);
         GetFile(photoPath, photoUrl);
         ++photoNo;
+    
+        while( (itemElement = itemElement->NextSiblingElement( "item" ) ) != NULL )
+        {
+            strcpy(photoUrl, itemElement->FirstChildElement("enclosure")->Attribute("url"));
+            sprintf(photoPath, "/usb/DCIM/%08d.jpg", photoNo);
+            GetFile(photoPath, photoUrl);
+            ++photoNo;
+        }
+    }
+    else
+    {
+        printf("lastBuildDate (original) == lastBuildDate (current)\n");
     }
     
     // Wait for the completion of writing to USB Mass Storage Device.
@@ -235,3 +250,46 @@
     
     return 0;
 }
+
+int removePhotos()
+{
+    if(DirHandle* dir = opendir("/usb/DCIM"))
+    {
+        int ret = 0;
+        while(struct dirent* ent = dir->readdir())
+        {
+            char filename[32] = {0};
+            sprintf(filename, "/usb/DCIM/%s", ent->d_name);
+            printf("remove %s\n", filename);
+            remove(filename);
+            ++ret;
+        }
+        return ret;
+    }
+    else
+    {
+        return -1;
+    }
+}
+
+const char* getExtensionFromUrl(const char* url)
+{
+    const char* tail = url;
+    while('\0' != *tail)
+    {
+        ++tail;
+    }
+    
+    for(const char* p = tail; p >= url; --p)
+    {
+        if ('/' == *p)
+        {
+            return tail;
+        }
+        if ( '.' == *p )
+        {
+            return p+1;
+        }
+    }
+    return tail;
+}