This is not exactly the answer for my question. Think of coding the Picture-Data in just readable Ascii-Characters. This maybe result in a very large string, ended with #13#10. I thought this result in a single OnDataAvailable-Event where I can read the whole string with one call to receivestr. I thought TWSocket concats the single parts until it finds the #13#10 (in linemode of course) and fires a single onDataAvailable-Event.
Am I wrong? Naturally this is not a good approach - sending it binary with a special data-structure is much better. > >> can someone tell me, how long the result of > >> the ReceiveStr Function can be? > > > AFAIK, it is limited with packet length. > > ReceiveStr will return at most what can fit into winsock receive buffer > which default to 8KB if memory serve me well. But if your program is > responsive, you'll likely never receive more than the largest packet size > which is 1514 bytes on Ethernet. > > >> I mean, are there any limitations or can I send a complete (maybe > >> acsii-coded) picture (~200kByte) in a String? > > Sending is totally independent of receiving ! TCP has no datagram boundaries > preserved. TWSocket will accept any size in SendStr. No problem to load your > image into a single string and send it in a single call to SendStr. This is > a bad idea, but ot will work. This doesn't mean the receiver will receive in > a single OnDataAvailable ! Please read "TCP/UDP primer" available from > "support" page at http://www.overbyte.be for more explanation. > > btw: To send a small image, you'd better load it into an array of bytes and > send it in a single call. For larger images, it is better to read the image > file by chunck (for example 4KB) and send each chunk individually. You send > the next chunk from the OnDataSent event. This way, you have never more than > 4KB in memory and will able to send multi-megabytes or gygabytes of data > without "using" too much RAM. -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
