Hi Ray, Say, I need to read a file and it has “This is a test.” in it.
I issue a GET for an object in the cloud. My callback is called with “This is a test.” in the buffer. I saved it into a local file. All is fine. Now, if someone deleted the object. I did not know. I issue a GET. My callback gets: <?xml version="1.0" encoding="UTF-8"?> <Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message><Key>smC1842A51E22A05000000000000A386410000000100003J7M3CMY9CMULJKG6Q</Key><RequestId>B09B6836031219A8</RequestId><HostId>GIxwOGJB8DMKoIxYcqNkRDL/a1rcrPyg7hmMx+UNNtvUVgaOILdjCMe/ntfo/+bIxWG1D5ws7SU=</HostId></Error> In my callback I did not know that this is an error message. I just save it in my local file. Toss my buffer away. Now I get an error return from libcurl with some http error. So, the question is how do I know my callback has been called with the Server’s extended error message, so that I can save it and not write it to file and toss the buffer away .. Thanks. Colin On 5/17/16, 4:06 PM, "curl-library on behalf of Ray Satiro via curl-library" <[email protected] on behalf of [email protected]> wrote: >On 5/17/2016 4:42 PM, Colin Ngam wrote: >> Yes, I understand that part after I get the content. >> >> In a GET situation my callback gets called by libcurl with data: >> 1st Call – I save the data. >> 2nd Call – I save the data. >> 3rd Call – I save the data. >> Done. Good. >> >> Now, if the Server has an error after the 2nd call, the 3rd call comes >> in, I do not know that it is an error message, I save and toss buffer. >> Save means write to file. Now I get an error condition status. >> >> What I am doing right now is that at each of the Call above, I compare >> the buffer for "<?xml version=“ and if it compares, I save it off to >> an error buffer just in case. > >Please do not top post it makes the conversation harder to follow [1]. > >I'm not sure I understand what you mean. To copy and paste from another >topic I just replied to: The write function is passed as much data as >available when it's called [2]. It will likely be called multiple times, >each time with a piece of the reply. It's up to your callback to append >those pieces. Take a look at the getinmemory example [3]. > >Once you have received the reply body in full then you can pass it to an >XML parser. If you are using a library like libxml2 it is possible to >use something like xmlParseChunk [4] instead to pass each chunk from the >write callback as it is received. > > >[1]: >https://urldefense.proofpoint.com/v2/url?u=https-3A__curl.haxx.se_mail_etiquette.html-23Do-5FNot-5FTop-5FPost&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=k8mjvTwz51Bs7QQSR3eM1Q69zvlrBQehCRZXBKywW9E&e= > >[2]: >https://urldefense.proofpoint.com/v2/url?u=https-3A__curl.haxx.se_libcurl_c_CURLOPT-5FWRITEFUNCTION.html&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=jO7Hhk-GGC9KkgyGdZo6MucnB69lCDLqtO_0RveWmho&e= > >[3]: >https://urldefense.proofpoint.com/v2/url?u=https-3A__curl.haxx.se_libcurl_c_getinmemory.html&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=0fAbQwD08s__inITDpbiobxSMEx_tTDIHK_ecVf6OMQ&e= > >[4]: >https://urldefense.proofpoint.com/v2/url?u=http-3A__www.xmlsoft.org_examples_parse4.c&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=4MxfFsoerXdEcZQk01aOYTkv0NFhBHvh446efHPC6-w&e= > > >------------------------------------------------------------------- >List admin: >https://urldefense.proofpoint.com/v2/url?u=https-3A__cool.haxx.se_list_listinfo_curl-2Dlibrary&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=NMqlxfDO_HoajZIDP1rBH_tk8S9as_P0NofDE-O6pao&e= > >Etiquette: >https://urldefense.proofpoint.com/v2/url?u=https-3A__curl.haxx.se_mail_etiquette.html&d=CwIGaQ&c=8S5idjlO_n28Ko3lg6lskTMwneSC-WqZ5EBTEEvDlkg&r=GgZxxOrjo7rUSi2a3aY7DXfeWcIXQ3Xn4a7ByYeR4wA&m=j6mf5IM4yebCXegKbj7LWFnozBECCHx46vqYlU72iyQ&s=_H8Yr1rdVljO_-vXw16mnDjrb5c9u1ANUV06D4nPaNc&e= > ---------------------------------------------------------------------- The information contained in this transmission may be confidential. 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