Add beginnings of SSDV upload (to ssdv.habhub.org) code

ssdv_upload.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python2.7
+#
+#	SSDV Upload Library
+#
+#
+
+import base64, requests, datetime, os
+
+ssdv_url = "http://ssdv.habhub.org/api/v0/packets"
+
+def ssdv_encode_packet(packet,callsign="N0CALL"):
+	packet_dict = {
+		"type":"packet",
+		"packet":base64.b64encode(packet),
+		"encoding":"base64",
+		# Because .isoformat() doesnt give us the right format... (boo)
+		"received":datetime.datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ"),
+		"receiver":callsign,
+	}
+	return packet_dict
+
+def ssdv_upload_single(packet,callsign="N0CALL"):
+	packet_dict = ssdv_encode_single(packet,callsign)
+
+	r = requests.post(ssdv_url,json=packet_dict)
+	return r
+
+def ssdv_upload_multiple(packet_array,callsign="N0CALL"):
+	encoded_array = []
+
+	for packet in packet_array:
+		encoded_array.append(ssdv_encode_packet(packet,callsign))
+
+	packet_dict = {
+		"type": "packets",
+		"packets": encoded_array
+	}
+	r = requests.post(ssdv_url,json=packet_dict)
+	return r
+
+
+def ssdv_upload_file(filename,callsign="N0CALL", blocksize=16):
+	file_size = os.path.getsize(filename)
+
+	if file_size % 256 > 0:
+		print("File size not a multiple of 256 bytes!")
+		return
+
+	packet_count = file_size/256
+	print("Uploading %d packets." % packet_count)
+
+	f = open(filename,"rb")
+
+	while packet_count > 0:
+
+		if packet_count <=blocksize:
+			# Read and transmit remainder of file.
+			data = f.read()
+			packet_array = [ data[i:i+256] for i in range(0,len(data),256)]
+			ssdv_upload_multiple(packet_array,callsign)
+			packet_count = 0
+		else:
+			data = f.read(blocksize*256)
+			packet_array = [ data[i:i+256] for i in range(0,len(data),256)]
+			ssdv_upload_multiple(packet_array,callsign)
+			packet_count = packet_count - blocksize
+
+		print("%d packets remaining." % packet_count)
+
+	f.close()
+
+if __name__ == '__main__':
+	import sys
+	filename = sys.argv[1]
+	callsign = sys.argv[2]
+	print("Uploading: %s with Callsign: %s" % (filename,callsign))
+
+	ssdv_upload_file(filename,callsign=callsign,blocksize=256)