# URI methods for application/x-www-form-urlencoded

**URL:** <https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211>\
**Category:** Development\
**Created:** [March 16, 2010, 7:49am UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211 "2010-03-16T07:49:31Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [March 16, 2010, 7:49am UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211/1 "2010-03-16T07:49:31Z")

</div>

e$B:G6a!“@.@%$5$s$,DI2C$7$?e(B URI.encode\_www\_form e$B$J$I!“e(B  
application/x-www-form-urlencoded  
e$B$r07$&%a%=%C%I$K$D$$$F!”$$$/$D$+%3%a%s%H$,$”$j$^$9!#e(B

- URI.encode\_www\_component

- URI.decode\_www\_component

- URI.encode\_www\_form

- URI.decode\_www\_form

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [March 16, 2010, 8:45pm UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211/2 "2010-03-16T20:45:40Z")

</div>

e$B@.@%$G$9!#e(B

(2010/03/16 15:48), Tanaka A. wrote:

> e$B:G6a!“@.@%$5$s$,DI2C$7$?e(B URI.encode\_www\_form e$B$J$I!“e(B  
> application/x-www-form-urlencoded e$B$r07$&%a%=%C%I$K$D$$$F!”$$$/$D$+%3%a%s%H$,$”$j$^$9!#e(B
> 
> - URI.encode\_www\_component

e$B$U$`!"JQ99$7$^$9!#e(B

> - “\x00” e$B$,e(B “%0” e$B$K$J$C$F$7$^$$$^$9!#e(B  
> % bin/ruby -ruri -e ‘p URI.encode\_www\_component(“\x00”)’  
> “%0”

e$B=$@5$7$^$9!#e(B

> ```
> e$BJ8;zC10L$G=hM}$9$k$N$G!"e(B"%83%41" e$B$K$J$k$Y$-$G$O$J$$$G$7$g$&$,!#e(B
> 
> e$B$3$l$O<B:]$K$O:$$i$J$$5$$O$7$^$9$,!#e(B
> 
> ```

e$B$\*$C$H!“$&$C$+$j$7$F$$$^$7$?!”=$@5$7$^$9!#e(B

> - e$B@8@.7k2L$Ne(B encoding e$B$O0z?t$Ne(B encoding e$B$K$J$j$^$9$,!“e(B  
> e$B$^$:$$\>l9g$b$”$k$N$G$O$J$$$G$7$g$&$+!#e(B  
> e$B0z?t$,e(B UTF-16BE e$B$J$Ie(B ASCIIe$BHs8\_49$N\>l9g$K$O$"$+$i$5$^$K$^$:$/$F!"e(B  
> e$B@8@.$7$?e(B % e$B$H$$$&J8;z$,J8;z$K$J$j$^$;$s!#e(B

e$B$3$l$b=$@5$7$^$9!#e(B

> - URI.decode\_www\_component

e$BJQ99$7$^$9!#e(B

> - URI.decode\_www\_component(“%20”) e$B$,6uJ8;zNs$K$J$C$F$7$^$$$^$9!#e(B  
> % bin/ruby -ruri -e ‘p URI.decode\_www\_component(“%20”)’  
> “”

e$B=$@5$7$^$9!#e(B

> - e$BBhe(B2e$B0z?t$H$7$Fe(B encoding e$B$r;XDj2DG=$K$9$Y$-$G$O$J$$$G$7$g$&$+!#e(B  
> application/x-www-form-urlencoded e$B$K$OJ8;z%(%s%3!\<%G%#%s%0$N\>pJs$,e(B  
> e$B4^$^$l$F$$$J$$$?$a!"8=\>u$Ne(B URI.decode\_www\_component e$B$Ge(B  
> e$B@5$7$$%(%s%3!\<%G%#%s%0$rIU2C$9$k$K$OJV$jCM$KBP$7$Fe(B force\_encoding e$B$re(B  
> e$B;H$&$3$H$K$J$j$^$9!#e(B  
> e$B$7$+$7!"e(Bforce\_encoding e$B$O4pK\E\*$K;H$&$Y$-$G$J$$$o$1$G!"e(B  
> URI.decode\_www\_component e$B\<+?H$,0z?t$H$7$F%(%s%3!\<%G%#%s%0$r\<u$1\<h$j!"e(B  
> e$BFbIt$Ge(B force\_encoding e$B$9$k$N$,NI$$$N$G$O$J$$$G$7$g$&$+!#e(B

e$B$=$&$G$9$M!"%G%U%)%k%H$Oe(B UTF-8 e$B$K$7$^$7$g$&$+!#e(B

> - URI.encode\_www\_form

e$BBhFs0z?t$G%;%Q%l!\<%?$r;XDj$5$;$k$3$H$O9M$($?$N$G$9$,!“e(B  
e$B$H$j$”$($::G=i$O$J$7$K$7$F$\*$/$3$H$K$7$^$9!#e(B

> - URI.decode\_www\_form

e$BLa$jCM$GG:$s$G$$$?$+$i$@$C$?$N$G$9$,!“e(BArray  
e$B$GDI2C$9$k$3$H$K$7$^$9!#e(B  
rdoc e$B$G$J$\<e(B Array  
e$B$J$N$+$H!”$I$&07$&$HJXMx$+$O0FFb$9$k$h$&$K$7$^$9!#e(B

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [March 21, 2010, 1:40pm UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211/3 "2010-03-21T13:40:11Z")

</div>

e$B@.@%$G$9!#e(B

(2010/03/21 0:36), Tanaka A. wrote:

> > 
> 
> - ISO-2022-JP e$B$J$I$HF1$8$/!"$9$Y$F$N%P%$%H$re(B percent encoding
> - e$BNc30e(B
> 
> e$B$J$\*!"e(BISO-2022-JP e$B$J$Ie(B Unicode e$B0J30$Ne(B ASCII incompatible encoding e$B$G$9$Y$F$Ne(B  
> e$B%P%$%H$re(B percent encoding e$B$K$9$k$H$$$&8=\>u$NF0:n$OJQ$($J$/$F$$$$$H;W$$$^$9!#e(B

e$B:$$C$?$H$-$O\<BAu$K$"$o$;$k$H8@$&$3$H$G!“e(BUTF-8  
e$B$KJQ49$9$k$3$H$K$7$^$7$?!#e(B  
e$B$^$?!”@h$N%a!\<%k$G;XE&$5$l$?e(B Shift\_JIS e$B$N%(%s%3!\<%I$O!"e(B  
“\x83\x41” e$B$Oe(B “%83A” e$B$H$J$k$h$&$KLa$7$^$7$?!#e(B

> > > - URI.decode\_www\_component
> 
> > > ```
> > > * e$BBhe(B2e$B0z?t$H$7$Fe(B encoding e$B$r;XDj2DG=$K$9$Y$-$G$O$J$$$G$7$g$&$+!#e(B
> > > 
> > > ```
> 
> > e$B$=$&$G$9$M!"%G%U%)%k%H$Oe(B UTF-8 e$B$K$7$^$7$g$&$+!#e(B
> 
> e$B%G%U%)%k%H$8$c$J$/$F6/@)$K$J$C$F$$$^$9!#e(B

e$B$\*$C$H3N$+$K!"D\>$7$^$7$?e(B

> e$B$"$H!“e(BTBLDECWWWCOMP\_[’+’] = ’ ’ if i == 0x20 e$B$,e(B  
> e$B%k!\<%W$NCf$K$”$k$N$OL5BL$G$7$g$&!#e(B

e$BD\>$7$^$7$?!#e(B

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [April 6, 2010, 10:46pm UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211/4 "2010-04-06T22:46:55Z")

</div>

e$B@.@%$G$9!#e(B

(2010/03/21 21:39), NARUSE, Yui wrote:

> > > > ```
> > > > e$B$3$l$b<B:]$K$O:$$i$J$$5$$O$7$^$9!#e(B
> > > > 
> > > > ```
> > 
> > - e$B\<+F0E\*$Ke(B UTF-8 e$B$KJQ49e(B
> > - ISO-2022-JP e$B$J$I$HF1$8$/!"$9$Y$F$N%P%$%H$re(B percent encoding
> > - e$BNc30e(B
> > 
> > e$B$J$\*!"e(BISO-2022-JP e$B$J$Ie(B Unicode e$B0J30$Ne(B ASCII incompatible encoding e$B$G$9$Y$F$Ne(B  
> > e$B%P%$%H$re(B percent encoding e$B$K$9$k$H$$$&8=\>u$NF0:n$OJQ$($J$/$F$$$$$H;W$$$^$9!#e(B
> 
> e$B:$$C$?$H$-$O\<BAu$K$"$o$;$k$H8@$&$3$H$G!“e(BUTF-8 e$B$KJQ49$9$k$3$H$K$7$^$7$?!#e(B  
> e$B$^$?!”@h$N%a!\<%k$G;XE&$5$l$?e(B Shift\_JIS e$B$N%(%s%3!\<%I$O!"e(B  
> “\x83\x41” e$B$Oe(B “%83A” e$B$H$J$k$h$&$KLa$7$^$7$?!#e(B

e$B$3$l$G$9$,!“:G?7$Ne(B HTML5  
e$B$K;XE&$,H?1G$5$l!”%P%$%HC10L$G%(%s%3!\<%I$9$k$h$&$K$J$j$^$7$?!#e(B  
[http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#url-encoded-form-data](http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#url-encoded-form-data)

---

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [March 20, 2010, 4:37pm UTC](https://www.ruby-forum.com/t/uri-methods-for-application-x-www-form-urlencoded/185211/5 "2010-03-20T16:37:03Z")

</div>

2010e$BG/e(B3e$B7ne(B17e$BF|e(B4:45 NARUSE, Yui [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> > - URI.encode\_www\_component

> > - e$B@8@.7k2L$Ne(B encoding e$B$O0z?t$Ne(B encoding e$B$K$J$j$^$9$,!“e(B  
> > e$B$^$:$$\>l9g$b$”$k$N$G$O$J$$$G$7$g$&$+!#e(B  
> > e$B0z?t$,e(B UTF-16BE e$B$J$Ie(B ASCIIe$BHs8\_49$N\>l9g$K$O$"$+$i$5$^$K$^$:$/$F!"e(B  
> > e$B@8@.$7$?e(B % e$B$H$$$&J8;z$,J8;z$K$J$j$^$;$s!#e(B
> 
> e$B$3$l$b=$@5$7$^$9!#e(B

e$B9M$($?$N$G$9$,!"$3$l$O$&$^$/$J$$$h$&$G$9!#e(B

% ./ruby -ruri -e ’  
v = URI.encode\_www\_form\_component("ae$B$“e(B”.encode(“UTF-16BE”))  
puts v.dump, v.encoding’  
“\x00a%30%42”  
US-ASCII

e$B$3$NNc$N7k2L$O!":G=i$Ne(B 2e$B%P%$%H$Oe(B UTF-16BE e$B$Je(B a  
e$B$H$$$&J8;z$G!"e(B  
e$B$=$l0J9\_$Oe(B US-ASCII e$B$Je(B %30%42 e$B$H$$$&e(B  
6e$BJ8;z$H$$$&$b$N$K$J$C$F$$$^$9!#e(B  
e$B$3$l$O$R$H$D$NJ8;zNs$NCf$Ke(B UTF-16BE e$B$He(B US-ASCII  
e$B$,:.$6$C$F$$$F!“e(B  
e$B$”$+$i$5$^$KJQ$G$9!#e(B

[HTML Standard](http://www.w3.org/TR/html5/forms.html#url-encoded-form-data) e$B$Ne(B

1. For each character in the entry’s name and value, apply the  
following  
subsubsteps:

e$B$H$$$&ItJ,$rFI$`$H!"e(Bselected character encoding e$B$,2?$+!“e(B  
e$B$H$$$&E@$,LdBj$K$J$j$^$9!#e(B  
e$B$3$NJ8=q$N$b$&$A$g$C$H\>e$NJ}$K$Oe(B selected character encoding  
e$B$Oe(B  
e$B$J$K$+e(B ASCII-compatible character encoding  
e$B$rA\*$V$H$$$&$3$H$,=q$$$F$”$j$^$9!#e(B

UTF-16BE e$B$O$"$+$i$5$^$Ke(B ASCII-compatible character encoding  
e$B$G$O$J$$$N$G$9$,!“e(B  
e$B$”$($F$=$NE@$OL5;k$7$FA\*$s$G$7$^$C$?$H$-$K2?$,5/$-$k$+$H$$$&$H!"e(B  
"ae$B$“e(B” e$B$H$$$&J8;zNs$N3FJ8;ze(B (“a”, "e$B$“e(B”)  
e$B$=$l$\>$l$K$D$$$F!"e(B  
“a” e$B$Oe(B U+0061 e$B$J$N$G%j%9%H$KF~$C$F$$$k$?$a$=$N$^$^$K$7$F!"e(B  
"e$B$“e(B” e$B$Oe(B U+3042 e$B$J$N$G%j%9%H$KF~$C$F$$$J$/$F!“e(B  
selected character encoding (e$B:#2s$Oe(B UTF-16BE)  
e$B$GI=8=$5$l$?J8;ze(B (0x30, 0x42)e$B$Ne(B  
e$B3F%P%$%H$=$l$\>$l$K$D$$$F!“e(B%HH e$B$N7A\<0$K$9$k$N$G!“e(B”%30%42”  
e$B$K$J$j!“e(B  
e$BA4BN$r9g$o$;$k$He(B “a%30%42” e$B$H$$$&7k2L$K$J$j$^$9!#e(B  
(e$B$=$7$F!”$3$NCf$Ke(B U+0020 e$B$OF~$C$F$$$J$$$N$Ge(B +  
e$B$K$J$k$H$3$m$O$”$j$^$;$se(B)

e$B$=$7$F!"e(BRFC 3986 (URI) e$B$r9M$($k$H!"e(B  
%30 e$B$de(B %42 e$B$KBP1~$9$ke(B ASCII e$BJ8;z$Oe(B unreserved  
e$B$J$N$G!"e(B  
e$B$=$l$i$Oe(B percent encoding  
e$B$K$9$k$+$I$&$+$G0UL#$,JQ2=$7$J$$$3$H$K$J$C$F$$$^$9!#e(B  
e$B$D$^$j!"e(B%30 e$B$Oe(B 0 e$B$HEy2A$G!“e(B%42 e$B$Oe(B B  
e$B$HEy2A$G$9!#e(B  
e$B$H$$$&$o$1$G!“e(B"a%30%42” e$B$H$$$&J8;zNs$r%G%3!\<%I$9$k$He(B “a0B”  
e$B$K$;$6$k$rF@$^$;$s!#e(B  
e$B$D$^$j!”$b$H$b$H$Ne(B "ae$B$“e(B” e$B$H$$$&J8;zNs$,EA$o$j$^$;$s!#e(B

e$B$D$^$j!“e(BASCII-compatible character encoding  
e$B$rA\*$V$3$H$K$J$C$F$$$k$N$K$OM}M3$,$”$j$^$9!#e(B  
e$BL5;k$9$k$N$O$h$m$7$/$"$j$^$;$s!#e(B

e$B;W$$Ib$+$VBP:v$H$7$F$O!"0J2\<$/$i$$$G$7$g$&$+!#e(B

- e$B\<+F0E\*$Ke(B UTF-8 e$B$KJQ49e(B
- ISO-2022-JP e$B$J$I$HF1$8$/!"$9$Y$F$N%P%$%H$re(B percent encoding
- e$BNc30e(B

e$B$J$\*!"e(BISO-2022-JP e$B$J$Ie(B Unicode e$B0J30$Ne(B ASCII  
incompatible encoding e$B$G$9$Y$F$Ne(B  
e$B%P%$%H$re(B percent encoding  
e$B$K$9$k$H$$$&8=\>u$NF0:n$OJQ$($J$/$F$$$$$H;W$$$^$9!#e(B

> > - URI.decode\_www\_component

> > - e$BBhe(B2e$B0z?t$H$7$Fe(B encoding e$B$r;XDj2DG=$K$9$Y$-$G$O$J$$$G$7$g$&$+!#e(B

> e$B$=$&$G$9$M!"%G%U%)%k%H$Oe(B UTF-8 e$B$K$7$^$7$g$&$+!#e(B

e$B%G%U%)%k%H$8$c$J$/$F6/@)$K$J$C$F$$$^$9!#e(B

% ./ruby -ruri -e ’  
v = URI.decode\_www\_form\_component(“%A1%A2”, “EUC-JP”)  
p v  
p v.encoding  
’  
“\xA1\xA2”  
#Encoding:UTF-8

e$B$;$C$+$/e(B enc e$B0z?t$r\<u$1IU$1$F$$$k$N$K!";H$C$F$$$^$;$s!#e(B

e$B$"$H!“e(BTBLDECWWWCOMP\_[‘+’] = ’ ’ if i == 0x20 e$B$,e(B  
e$B%k!\<%W$NCf$K$”$k$N$OL5BL$G$7$g$&!#e(B