Hello,
My app runs on Symbol's SPT 174x, which has wireless WAN connectivity (802.11). The
app communicates with a web server using HTTP over TCP/IP on the wireless link.
I'm trying to download a Palm DB that I create on the fly on the server to the Palm,
and then use DmCreateDatabaseFromImage. I'm creating the pdb file using the Java code
in Mann's & Ripschpater's excellent book "Advanced Palm Programming." Creating pdb
files this way and using HotSync to install them works fine. But when I try to
transfer the pdb file to the Palm using HTTP and try to "install" it using
DmCreateDatabaseFromImage, it returns error 0x201 (dmErrMemError).
I also tried using ExgDbRead(), but got the same error after it read about 90 bytes or
so. I checked the archives, but references to dmErrMemError all seemed to do with
installing a .prc that wasn't segmented. The pdb I'm trying to install is small - just
over 2KB.
Here's the relevant code. "weber" is my HTTP client class.
char httpRequest[80];
Err error;
int numRecs = 0;
//Boolean needReset;
LocalID dbId = 0;
//void* userData = 0;
MemPtr dbMemP = 0;
int dbSize = 0, totalBytes = 0;
// Find and delete any previous database
eventHistDb.RemoveDb();
// Send request to HTTP server
StrPrintF(httpRequest, historyPath, gSerialNum);
error = weber->send(httpRequest, 0, 0);
if (!error && weber->getResponseCode() == PalmHTTP::HTTP_OK) {
dbSize = weber->getContentLength(); // slightly larger
than db
dbMemP = MemPtrNew(dbSize);
char* dataP = (char*) dbMemP;
MemSet(dataP, dbSize, 0);
while (totalBytes < dbSize) {
int reqBytes = min(1024, dbSize - totalBytes);
int bytes = weber->getDecryptedChunk(dataP, reqBytes, &error);
if (bytes <= 0)
break;
dataP += bytes;
totalBytes += bytes;
}
/* *** this didn't work :-(
error = ExgDBRead(&eventHistDb.ExgReadProc,
&eventHistDb.ExgDeleteProc,
userData,
&dbId,
0, //
card number
&needReset,
true); // keep
creation/mod/backup dates of db
*/
}
error = weber->close();
if (weber->getResponseCode() != PalmHTTP::HTTP_OK) {
weber->doResponseAlert();
MemPtrFree(dbMemP);
return;
}
error = DmCreateDatabaseFromImage(dbMemP);
MemPtrFree(dbMemP);
dbId = DmFindDatabase(cardNo, dbName);
// Open new temp db
eventHistDb.OpenDb(dbId);
Thanks for any help,
Michael
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