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Wrongly escaped UTF-8 characters in JSON values ( epan/print.c )
From: Andrea Lo Pumo <alopumo () movia biz>
Date: Thu, 5 Jul 2018 16:01:05 +0200
I am using "tshark -T json -V -r file.pcap" and specifically I am looking for the gsm_sms.sms_text field. I get this output: "gsm_sms.sms_text": "Ok per\u00c3\u00b2 non piove" Instead, using "tshark -V -r file.pcap" I get: SMS text: Ok però non piove (There is an accent in the "o" of "però") The problem is that the \uXXYY syntax is UTF-16 (see [1]), while "ò" is UTF-8 and its bytes are c3 b2. Wireshark writes c3 b2 as they were UTF-16. I solved the problem by changing print_escaped_bare() of epan/print.c as follow: substitute default: if (g_ascii_isprint(*p)) fputc(*p, fh); else { g_snprintf(temp_str, sizeof(temp_str), "\\u00%02x", (guint8)*p); fputs(temp_str, fh); } with default: fputc(*p, fh); I do not know the Wireshark code, so I am not submitting a patch. This, however, should work because JSON supports UTF-8 (see again [1]). [1] From the JSON page on Wikipedia: JSON exchange in an open ecosystem must be encoded in UTF-8 <https://en.wikipedia.org/wiki/UTF-8>. However, if escaped, those characters must be written using UTF-16 <https://en.wikipedia.org/wiki/UTF-16> surrogate pairs, a detail missed by some JSON parsers.
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Current thread:
- Wrongly escaped UTF-8 characters in JSON values ( epan/print.c ) Andrea Lo Pumo (Jul 05)
- Re: Wrongly escaped UTF-8 characters in JSON values ( epan/print.c ) Dario Lombardo (Jul 05)
- Re: Wrongly escaped UTF-8 characters in JSON values ( epan/print.c ) Andrea Lo Pumo (Jul 06)
- Re: Wrongly escaped UTF-8 characters in JSON values ( epan/print.c ) Dario Lombardo (Jul 06)
- Re: Wrongly escaped UTF-8 characters in JSON values ( epan/print.c ) Richard Sharpe (Jul 06)