Dependencies: EthernetNetIf mbed
HTTPClientStreamingExample.cpp@3:b69bca736df0, 2010-07-09 (annotated)
- Committer:
- donatien
- Date:
- Fri Jul 09 14:45:12 2010 +0000
- Revision:
- 3:b69bca736df0
- Parent:
- 1:e6e8b074e675
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
donatien | 0:c9e889dbdca5 | 1 | #include "mbed.h" |
donatien | 0:c9e889dbdca5 | 2 | #include "EthernetNetIf.h" |
donatien | 0:c9e889dbdca5 | 3 | #include "HTTPClient.h" |
donatien | 0:c9e889dbdca5 | 4 | |
donatien | 0:c9e889dbdca5 | 5 | EthernetNetIf eth; |
donatien | 0:c9e889dbdca5 | 6 | HTTPClient http; |
donatien | 0:c9e889dbdca5 | 7 | |
donatien | 0:c9e889dbdca5 | 8 | HTTPResult result; |
donatien | 0:c9e889dbdca5 | 9 | bool completed = false; |
donatien | 0:c9e889dbdca5 | 10 | void request_callback(HTTPResult r) |
donatien | 0:c9e889dbdca5 | 11 | { |
donatien | 0:c9e889dbdca5 | 12 | result = r; |
donatien | 0:c9e889dbdca5 | 13 | completed = true; |
donatien | 0:c9e889dbdca5 | 14 | } |
donatien | 0:c9e889dbdca5 | 15 | |
donatien | 0:c9e889dbdca5 | 16 | int main() { |
donatien | 0:c9e889dbdca5 | 17 | |
donatien | 0:c9e889dbdca5 | 18 | printf("Start\n"); |
donatien | 0:c9e889dbdca5 | 19 | |
donatien | 0:c9e889dbdca5 | 20 | printf("Setting up...\n"); |
donatien | 0:c9e889dbdca5 | 21 | EthernetErr ethErr = eth.setup(); |
donatien | 0:c9e889dbdca5 | 22 | if(ethErr) |
donatien | 0:c9e889dbdca5 | 23 | { |
donatien | 0:c9e889dbdca5 | 24 | printf("Error %d in setup.\n", ethErr); |
donatien | 0:c9e889dbdca5 | 25 | return -1; |
donatien | 0:c9e889dbdca5 | 26 | } |
donatien | 0:c9e889dbdca5 | 27 | printf("Setup OK\n"); |
donatien | 0:c9e889dbdca5 | 28 | |
donatien | 0:c9e889dbdca5 | 29 | HTTPStream stream; |
donatien | 0:c9e889dbdca5 | 30 | |
donatien | 0:c9e889dbdca5 | 31 | char BigBuf[512 + 1] = {0}; |
donatien | 0:c9e889dbdca5 | 32 | stream.readNext((byte*)BigBuf, 512); //Point to buffer for the first read |
donatien | 1:e6e8b074e675 | 33 | //HTTPResult r = http.get("http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/front_page/rss.xml", &stream, request_callback); //Load a very large page, such as the hackaday RSS feed |
donatien | 3:b69bca736df0 | 34 | //HTTPResult r = http.get("http://hackaday.com/feed/", &stream, request_callback); //Load a very large page, such as the hackaday RSS feed |
donatien | 3:b69bca736df0 | 35 | HTTPResult r = http.get("http://mbed.org/blog/feeds/entries/", &stream, request_callback); //Load a very large page |
donatien | 0:c9e889dbdca5 | 36 | |
donatien | 0:c9e889dbdca5 | 37 | while(!completed) |
donatien | 0:c9e889dbdca5 | 38 | { |
donatien | 0:c9e889dbdca5 | 39 | Net::poll(); //Polls the Networking stack |
donatien | 0:c9e889dbdca5 | 40 | if(stream.readable()) |
donatien | 0:c9e889dbdca5 | 41 | { |
donatien | 0:c9e889dbdca5 | 42 | BigBuf[stream.readLen()] = 0; //Transform this buffer in a zero-terminated char* string |
donatien | 0:c9e889dbdca5 | 43 | printf("%s",BigBuf); //Display it while loading |
donatien | 0:c9e889dbdca5 | 44 | //Note: some servers do not like if you throttle them too much, so printf'ing during a request is generally bad practice |
donatien | 0:c9e889dbdca5 | 45 | stream.readNext((byte*)BigBuf, 512); //Buffer has been read, now we can put more data in it |
donatien | 0:c9e889dbdca5 | 46 | } |
donatien | 0:c9e889dbdca5 | 47 | } |
donatien | 0:c9e889dbdca5 | 48 | printf("\n--------------\n"); |
donatien | 0:c9e889dbdca5 | 49 | if(result == HTTP_OK) |
donatien | 0:c9e889dbdca5 | 50 | { |
donatien | 0:c9e889dbdca5 | 51 | printf("Read completely\n"); |
donatien | 0:c9e889dbdca5 | 52 | } |
donatien | 0:c9e889dbdca5 | 53 | else |
donatien | 0:c9e889dbdca5 | 54 | { |
donatien | 0:c9e889dbdca5 | 55 | printf("Error %d\n", result); |
donatien | 0:c9e889dbdca5 | 56 | } |
donatien | 0:c9e889dbdca5 | 57 | |
donatien | 0:c9e889dbdca5 | 58 | while(1) |
donatien | 0:c9e889dbdca5 | 59 | { |
donatien | 0:c9e889dbdca5 | 60 | |
donatien | 0:c9e889dbdca5 | 61 | } |
donatien | 0:c9e889dbdca5 | 62 | |
donatien | 0:c9e889dbdca5 | 63 | return 0; |
donatien | 0:c9e889dbdca5 | 64 | |
donatien | 0:c9e889dbdca5 | 65 | } |