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TwitterのURL抽出の正規表現

Last updated at Posted at 2012-04-07

TwitterのURL短縮で面倒なことになったので、正規表現を作ってみた。

TwitterのURL判定とほぼ一致します。

regex
urlRegex = "(?<![\\w])https?://(([\\w]|[^ -~])+(([\\w\\-]|[^ -~])+([\\w]|[^ -~]))?\\.)+(aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|xxx|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|dd|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|ss|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|za|zm|zw)(?![\\w])(/([\\w\\.\\-\\$&%/:=#~!]*\\??[\\w\\.\\-\\$&%/:=#~!]*[\\w\\-\\$/#])?)?";

正規表現が使える言語ならどれでも使用可能。なはず。

追記:どうやらアルゴリズムがちょっと変わったみたいです。Twitter側でも実際の文字数と表示されている文字数に食い違いがあり投稿できない場合があるようです。URLに括弧を使った場合などにおかしくなる模様です。

おまけ @(メンション)判定

regex
mentionRegex = "(?<![\\w])(@|@)([\\w]{1,15})"
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