… | |
… | |
159 | as per RFC4627. The resulting encoded JSON text can be treated as a native |
159 | as per RFC4627. The resulting encoded JSON text can be treated as a native |
160 | unicode string, an ascii-encoded, latin1-encoded or UTF-8 encoded string, |
160 | unicode string, an ascii-encoded, latin1-encoded or UTF-8 encoded string, |
161 | or any other superset of ASCII. |
161 | or any other superset of ASCII. |
162 | |
162 | |
163 | If C<$enable> is false, then the C<encode> method will not escape Unicode |
163 | If C<$enable> is false, then the C<encode> method will not escape Unicode |
164 | characters unless required by the JSON syntax. This results in a faster |
164 | characters unless required by the JSON syntax or other flags. This results |
165 | and more compact format. |
165 | in a faster and more compact format. |
|
|
166 | |
|
|
167 | The main use for this flag is to produce JSON texts that can be |
|
|
168 | transmitted over a 7-bit channel, as the encoded JSON texts will not |
|
|
169 | contain any 8 bit characters. |
166 | |
170 | |
167 | JSON::XS->new->ascii (1)->encode ([chr 0x10401]) |
171 | JSON::XS->new->ascii (1)->encode ([chr 0x10401]) |
168 | => ["\ud801\udc01"] |
172 | => ["\ud801\udc01"] |
|
|
173 | |
|
|
174 | =item $json = $json->latin1 ([$enable]) |
|
|
175 | |
|
|
176 | If C<$enable> is true (or missing), then the C<encode> method will encode |
|
|
177 | the resulting JSON text as latin1 (or iso-8859-1), escaping any characters |
|
|
178 | outside the code range C<0..255>. The resulting string can be treated as a |
|
|
179 | latin1-encoded JSON text or a native unicode string. The C<decode> method |
|
|
180 | will not be affected in any way by this flag, as C<decode> by default |
|
|
181 | expects unicode, which is a strict superset of latin1. |
|
|
182 | |
|
|
183 | If C<$enable> is false, then the C<encode> method will not escape Unicode |
|
|
184 | characters unless required by the JSON syntax or other flags. |
|
|
185 | |
|
|
186 | The main use for this flag is efficiently encoding binary data as JSON |
|
|
187 | text, as most octets will not be escaped, resulting in a smaller encoded |
|
|
188 | size. The disadvantage is that the resulting JSON text is encoded |
|
|
189 | in latin1 (and must correctly be treated as such when storing and |
|
|
190 | transfering), a rare encoding for JSON. It is therefore most useful when |
|
|
191 | you want to store data structures known to contain binary data efficiently |
|
|
192 | in files or databases, not when talking to other JSON encoders/decoders. |
|
|
193 | |
|
|
194 | JSON::XS->new->latin1->encode (["\x{89}\x{abc}"] |
|
|
195 | => ["\x{89}\\u0abc"] # (perl syntax, U+abc escaped, U+89 not) |
169 | |
196 | |
170 | =item $json = $json->utf8 ([$enable]) |
197 | =item $json = $json->utf8 ([$enable]) |
171 | |
198 | |
172 | If C<$enable> is true (or missing), then the C<encode> method will encode |
199 | If C<$enable> is true (or missing), then the C<encode> method will encode |
173 | the JSON result into UTF-8, as required by many protocols, while the |
200 | the JSON result into UTF-8, as required by many protocols, while the |