diff --git a/autoload/SpaceVim/api/web/html.vim b/autoload/SpaceVim/api/web/html.vim
new file mode 100644
index 000000000..4b4d152de
--- /dev/null
+++ b/autoload/SpaceVim/api/web/html.vim
@@ -0,0 +1,53 @@
+let s:save_cpo = &cpo
+set cpo&vim
+
+let s:self = {}
+let s:XML = SpaceVim#api#import('web#xml')
+let s:HTTP = SpaceVim#api#import('web#http')
+
+function! s:self.decodeEntityReference(str) abort
+  let str = a:str
+  let str = substitute(str, '>', '>', 'g')
+  let str = substitute(str, '&lt;', '<', 'g')
+  let str = substitute(str, '&quot;', '"', 'g')
+  let str = substitute(str, '&apos;', "'", 'g')
+  let str = substitute(str, '&nbsp;', ' ', 'g')
+  let str = substitute(str, '&yen;', '\&#65509;', 'g')
+  let str = substitute(str, '&#\(\d\+\);', '\=s:nr2enc_char(submatch(1))', 'g')
+  let str = substitute(str, '&amp;', '\&', 'g')
+  let str = substitute(str, '&raquo;', '>', 'g')
+  let str = substitute(str, '&laquo;', '<', 'g')
+  return str
+endfunction
+
+function! s:self.encodeEntityReference(str) abort
+  let str = a:str
+  let str = substitute(str, '&', '\&amp;', 'g')
+  let str = substitute(str, '>', '\&gt;', 'g')
+  let str = substitute(str, '<', '\&lt;', 'g')
+  let str = substitute(str, "\n", '\&#x0d;', 'g')
+  let str = substitute(str, '"', '\&quot;', 'g')
+  let str = substitute(str, "'", '\&apos;', 'g')
+  let str = substitute(str, ' ', '\&nbsp;', 'g')
+  return str
+endfunction
+
+function! s:self.parse(html) abort
+  let html = substitute(a:html, '<\(area\|base\|basefont\|br\|nobr\|col\|frame\|hr\|img\|input\|isindex\|link\|meta\|param\|embed\|keygen\|command\)\([^>]*[^/]\|\)>', '<\1\2/>', 'g')
+  return s:XML.parse(html)
+endfunction
+
+function! s:self.parseFile(file) abort
+    return self.parse(join(readfile(a:file), "\n"))
+endfunction
+
+function! s:self.parseURL(url) abort
+    return self.parse(s:HTTP.get(a:url).content)
+endfunction
+
+function! SpaceVim#api#web#html#get() abort
+    return deepcopy(s:self)
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
diff --git a/autoload/SpaceVim/api/web/http.vim b/autoload/SpaceVim/api/web/http.vim
new file mode 100644
index 000000000..9b548e498
--- /dev/null
+++ b/autoload/SpaceVim/api/web/http.vim
@@ -0,0 +1,478 @@
+let s:save_cpo = &cpo
+set cpo&vim
+
+let s:self = {}
+
+let s:system = function(get(g:, 'webapi#system_function', 'system'))
+
+function! s:nr2byte(nr) abort
+  if a:nr < 0x80
+    return nr2char(a:nr)
+  elseif a:nr < 0x800
+    return nr2char(a:nr/64+192).nr2char(a:nr%64+128)
+  elseif a:nr < 0x10000
+    return nr2char(a:nr/4096%16+224).nr2char(a:nr/64%64+128).nr2char(a:nr%64+128)
+  elseif a:nr < 0x200000
+    return nr2char(a:nr/262144%16+240).nr2char(a:nr/4096/16+128).nr2char(a:nr/64%64+128).nr2char(a:nr%64+128)
+  elseif a:nr < 0x4000000
+    return nr2char(a:nr/16777216%16+248).nr2char(a:nr/262144%16+128).nr2char(a:nr/4096/16+128).nr2char(a:nr/64%64+128).nr2char(a:nr%64+128)
+  else
+    return nr2char(a:nr/1073741824%16+252).nr2char(a:nr/16777216%16+128).nr2char(a:nr/262144%16+128).nr2char(a:nr/4096/16+128).nr2char(a:nr/64%64+128).nr2char(a:nr%64+128)
+  endif
+endfunction
+
+function! s:nr2enc_char(charcode) abort
+  if &encoding ==# 'utf-8'
+    return nr2char(a:charcode)
+  endif
+  let char = s:nr2byte(a:charcode)
+  if strlen(char) > 1
+    let char = strtrans(iconv(char, 'utf-8', &encoding))
+  endif
+  return char
+endfunction
+
+function! s:nr2hex(nr) abort
+  let n = a:nr
+  let r = ''
+  while n
+    let r = '0123456789ABCDEF'[n % 16] . r
+    let n = n / 16
+  endwhile
+  return r
+endfunction
+
+function! s:urlencode_char(c, ...) abort
+  let is_binary = get(a:000, 1)
+  let c = a:c
+  if !is_binary
+    let c = iconv(a:c, &encoding, 'utf-8')
+    if c ==# ''
+      let c = a:c
+    endif
+  endif
+  let s = ''
+  for i in range(strlen(c))
+    let s .= printf('%%%02X', char2nr(c[i]))
+  endfor
+  return s
+endfunction
+
+function! s:self.decodeURI(str) abort
+  let ret = a:str
+  let ret = substitute(ret, '+', ' ', 'g')
+  let ret = substitute(ret, '%\(\x\x\)', '\=printf("%c", str2nr(submatch(1), 16))', 'g')
+  return ret
+endfunction
+
+function! s:self.escape(str) abort
+  return substitute(a:str, '[^a-zA-Z0-9_.~/-]', '\=s:urlencode_char(submatch(0))', 'g')
+endfunction
+
+function! s:self.encodeURI(items, ...) abort
+  let is_binary = get(a:000, 1)
+  let ret = ''
+  if type(a:items) == 4
+    for key in sort(keys(a:items))
+      if strlen(ret) | let ret .= '&' | endif
+      let ret .= key . '=' . s:self.encodeURI(a:items[key])
+    endfor
+  elseif type(a:items) == 3
+    for item in sort(a:items)
+      if strlen(ret) | let ret .= '&' | endif
+      let ret .= item
+    endfor
+  else
+    let ret = substitute(a:items, '[^a-zA-Z0-9_.~-]', '\=s:urlencode_char(submatch(0), is_binary)', 'g')
+  endif
+  return ret
+endfunction
+
+function! s:self.encodeURIComponent(items) abort
+  let ret = ''
+  if type(a:items) == 4
+    for key in sort(keys(a:items))
+      if strlen(ret) | let ret .= '&' | endif
+      let ret .= key . '=' . s:self.encodeURIComponent(a:items[key])
+    endfor
+  elseif type(a:items) == 3
+    for item in sort(a:items)
+      if strlen(ret) | let ret .= '&' | endif
+      let ret .= item
+    endfor
+  else
+    let items = iconv(a:items, &enc, 'utf-8')
+    let len = strlen(items)
+    let i = 0
+    while i < len
+      let ch = items[i]
+      if ch =~# '[0-9A-Za-z-._~!''()*]'
+        let ret .= ch
+      elseif ch ==# ' '
+        let ret .= '+'
+      else
+        let ret .= '%' . substitute('0' . s:nr2hex(char2nr(ch)), '^.*\(..\)$', '\1', '')
+      endif
+      let i = i + 1
+    endwhile
+  endif
+  return ret
+endfunction
+
+function! s:self.get(url, ...) abort
+  let getdata = a:0 > 0 ? a:000[0] : {}
+  let headdata = a:0 > 1 ? a:000[1] : {}
+  let follow = a:0 > 2 ? a:000[2] : 1
+  let url = a:url
+  let getdatastr = self.encodeURI(getdata)
+  if strlen(getdatastr)
+    let url .= '?' . getdatastr
+  endif
+  if executable('curl')
+    let command = printf('curl -q %s -s -k -i', follow ? '-L' : '')
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' -H ' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' -H ' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' ' . quote . url . quote
+    let res = s:system(command)
+  elseif executable('wget')
+    let command = printf('wget -O- --save-headers --server-response -q %s', follow ? '-L' : '')
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' --header=' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' --header=' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' ' . quote . url . quote
+    let res = s:system(command)
+  else
+    throw 'require `curl` or `wget` command'
+  endif
+  if follow != 0
+    let mx = 'HTTP/\%(1\.[01]\|2\%(\.0\)\?\)'
+    while res =~# '^' . mx . ' 3' || res =~# '^' . mx . ' [0-9]\{3} .\+\n\r\?\n' . mx . ' .\+'
+      let pos = stridx(res, "\r\n\r\n")
+      if pos != -1
+        let res = strpart(res, pos+4)
+      else
+        let pos = stridx(res, "\n\n")
+        let res = strpart(res, pos+2)
+      endif
+    endwhile
+  endif
+  let pos = stridx(res, "\r\n\r\n")
+  if pos != -1
+    let content = strpart(res, pos+4)
+  else
+    let pos = stridx(res, "\n\n")
+    let content = strpart(res, pos+2)
+  endif
+  let header = split(res[:pos-1], '\r\?\n')
+  let matched = matchlist(get(header, 0), '^HTTP/\%(1\.[01]\|2\%(\.0\)\?\)\s\+\(\d\+\)\s*\(.*\)')
+  if !empty(matched)
+    let [status, message] = matched[1 : 2]
+    call remove(header, 0)
+  else
+    if v:shell_error || len(matched)
+      let [status, message] = ['500', "Couldn't connect to host"]
+    else
+      let [status, message] = ['200', 'OK']
+    endif
+  endif
+  return {
+  \ 'status' : status,
+  \ 'message' : message,
+  \ 'header' : header,
+  \ 'content' : content
+  \}
+endfunction
+
+function! s:self.post(url, ...) abort
+  let postdata = a:0 > 0 ? a:000[0] : {}
+  let headdata = a:0 > 1 ? a:000[1] : {}
+  let method = a:0 > 2 ? a:000[2] : 'POST'
+  let follow = a:0 > 3 ? a:000[3] : 1
+  let url = a:url
+  if type(postdata) == 4
+    let postdatastr = self.encodeURI(postdata)
+  else
+    let postdatastr = postdata
+  endif
+  let file = tempname()
+  if executable('curl')
+    let command = printf('curl -q %s -s -k -i -X %s', (follow ? '-L' : ''), len(method) ? method : 'POST')
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' -H ' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' -H ' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' ' . quote . url . quote
+    call writefile(split(postdatastr, "\n"), file, 'b')
+    let res = s:system(command . ' --data-binary @' . quote.file.quote)
+  elseif executable('wget')
+    let command = printf('wget -O- --save-headers --server-response -q %s', follow ? '-L' : '')
+    let headdata['X-HTTP-Method-Override'] = method
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' --header=' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' --header=' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' '.quote.url.quote
+    call writefile(split(postdatastr, "\n"), file, 'b')
+    let res = s:system(command . ' --post-data @' . quote.file.quote)
+  else
+    throw 'require `curl` or `wget` command'
+  endif
+  call delete(file)
+  if follow != 0
+    let mx = 'HTTP/\%(1\.[01]\|2\%(\.0\)\?\)'
+    while res =~# '^' . mx . ' 3' || res =~# '^' . mx . ' [0-9]\{3} .\+\n\r\?\n' . mx . ' .\+'
+      let pos = stridx(res, "\r\n\r\n")
+      if pos != -1
+        let res = strpart(res, pos+4)
+      else
+        let pos = stridx(res, "\n\n")
+        let res = strpart(res, pos+2)
+      endif
+    endwhile
+  endif
+  let pos = stridx(res, "\r\n\r\n")
+  if pos != -1
+    let content = strpart(res, pos+4)
+  else
+    let pos = stridx(res, "\n\n")
+    let content = strpart(res, pos+2)
+  endif
+  let header = split(res[:pos-1], '\r\?\n')
+  let matched = matchlist(get(header, 0), '^HTTP/\%(1\.[01]\|2\%(\.0\)\?\)\s\+\(\d\+\)\s*\(.*\)')
+  if !empty(matched)
+    let [status, message] = matched[1 : 2]
+    call remove(header, 0)
+  else
+    if v:shell_error || len(matched)
+      let [status, message] = ['500', "Couldn't connect to host"]
+    else
+      let [status, message] = ['200', 'OK']
+    endif
+  endif
+  return {
+  \ 'status' : status,
+  \ 'message' : message,
+  \ 'header' : header,
+  \ 'content' : content
+  \}
+endfunction
+
+function! s:self.send(req) abort
+  let postdata = get(a:req, 'data', '')
+  let method = get(a:req, 'method', postdata ==# '' ? 'GET': 'POST')
+  let headdata = get(a:req, 'header', {})
+  let follow = get(a:req, 'follow', 1)
+  let url = get(a:req, 'url', '')
+  if type(postdata) == 4
+    let postdatastr = self.encodeURI(postdata)
+  else
+    let postdatastr = postdata
+  endif
+  if empty(postdatastr)
+    let file = ''
+  else
+    let file = tempname()
+  endif
+  if executable('curl')
+    let command = printf('curl -q %s -s -k -i -X %s', (follow ? '-L' : ''), len(method) ? method : 'POST')
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' -H ' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' -H ' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' ' . quote . url . quote
+    if file ==# ''
+      let res = s:system(command)
+    else
+      call writefile(split(postdatastr, "\n"), file, 'b')
+      let res = s:system(command . ' --data-binary @' . quote.file.quote)
+      call delete(file)
+    endif
+  elseif executable('wget')
+    let command = printf('wget -O- --save-headers --server-response -q %s', follow ? '-L' : '')
+    let headdata['X-HTTP-Method-Override'] = method
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' --header=' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' --header=' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' '.quote.url.quote
+    if file ==# ''
+      let res = s:system(command)
+    else
+      call writefile(split(postdatastr, "\n"), file, 'b')
+      let res = s:system(command . ' --post-data @' . quote.file.quote)
+      call delete(file)
+    endif
+  else
+    throw 'require `curl` or `wget` command'
+  endif
+  if follow != 0
+    let mx = 'HTTP/\%(1\.[01]\|2\%(\.0\)\?\)'
+    while res =~# '^' . mx . ' 3' || res =~# '^' . mx . ' [0-9]\{3} .\+\n\r\?\n' . mx . ' .\+'
+      let pos = stridx(res, "\r\n\r\n")
+      if pos != -1
+        let res = strpart(res, pos+4)
+      else
+        let pos = stridx(res, "\n\n")
+        let res = strpart(res, pos+2)
+      endif
+    endwhile
+  endif
+  let pos = stridx(res, "\r\n\r\n")
+  if pos != -1
+    let content = strpart(res, pos+4)
+  else
+    let pos = stridx(res, "\n\n")
+    let content = strpart(res, pos+2)
+  endif
+  let header = split(res[:pos-1], '\r\?\n')
+  let matched = matchlist(get(header, 0), '^HTTP/\%(1\.[01]\|2\%(\.0\)\?\)\s\+\(\d\+\)\s*\(.*\)')
+  if !empty(matched)
+    let [status, message] = matched[1 : 2]
+    call remove(header, 0)
+  else
+    if v:shell_error || len(matched)
+      let [status, message] = ['500', "Couldn't connect to host"]
+    else
+      let [status, message] = ['200', 'OK']
+    endif
+  endif
+  return {
+  \ 'status' : status,
+  \ 'message' : message,
+  \ 'header' : header,
+  \ 'content' : content
+  \}
+endfunction
+
+function! s:self.stream(req) abort
+  let postdata = get(a:req, 'data', '')
+  let method = get(a:req, 'method', postdata ==# '' ? 'GET': 'POST')
+  let headdata = get(a:req, 'header', {})
+  let follow = get(a:req, 'follow', 1)
+  let url = get(a:req, 'url', '')
+  let mode = get(a:req, 'mode', 'nl')
+  if type(postdata) == 4
+    let postdatastr = self.encodeURI(postdata)
+  else
+    let postdatastr = postdata
+  endif
+  if empty(postdatastr)
+    let file = ''
+  else
+    let file = tempname()
+  endif
+  if executable('curl')
+    let command = printf('curl -q %s -s -k -X %s', (follow ? '-L' : ''), len(method) ? method : 'POST')
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' -H ' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' -H ' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' '.quote . url . quote
+    if file ==# ''
+      let job = job_start(command)
+    else
+      call writefile(split(postdatastr, "\n"), file, 'b')
+      let job = job_start(command . ' --data-binary @' . quote.file.quote)
+      call delete(file)
+    endif
+  elseif executable('wget')
+    let command = printf('wget -O- -q %s', follow ? '-L' : '')
+    let headdata['X-HTTP-Method-Override'] = method
+    let quote = &shellxquote ==# '"' ?  "'" : '"'
+    for key in keys(headdata)
+      if has('win32')
+        let command .= ' --header=' . quote . key . ': ' . substitute(headdata[key], '"', '"""', 'g') . quote
+      else
+        let command .= ' --header=' . quote . key . ': ' . headdata[key] . quote
+      endif
+    endfor
+    let command .= ' '.quote.url.quote
+    if file ==# ''
+      let job = job_start(command)
+    else
+      call writefile(split(postdatastr, "\n"), file, 'b')
+      let job = job_start(command . ' --post-data @' . quote.file.quote)
+      call delete(file)
+    endif
+  else
+    throw 'require `curl` or `wget` command'
+  endif
+  call job_setoptions(job,
+  \{
+  \  'exit_cb': function('webapi#http#exit_cb', [a:req]),
+  \  'stoponexit': 'kill',
+  \})
+  let a:req['job'] = job
+
+  let channel = job_getchannel(job)
+  call ch_setoptions(channel,
+  \{
+  \  'out_cb': function('webapi#http#out_cb', [a:req]),
+  \  'mode': mode,
+  \})
+  let a:req['channel'] = channel
+  let a:req['file'] = file
+endfunction
+
+" @vimlint(EVL103, 1, a:job)
+function! s:self.exit_cb(req, job, code) abort
+  let file = get(a:req, 'file')
+  if file !=# ''
+    call delete(file)
+  endif
+  let fexit_cb = get(a:req, 'exit_cb', v:none)
+  if fexit_cb != v:none
+    call call(fexit_cb, [a:code])
+  endif
+endfunction
+" @vimlint(EVL103, 0, a:job)
+
+" @vimlint(EVL103, 1, a:ch)
+function! s:self.out_cb(req, ch, data) abort
+  let fout_cb = get(a:req, 'out_cb', v:none)
+  if fout_cb != v:none
+    call Fout_cb(a:data)
+    call call(fout_cb, [a:data])
+  endif
+endfunction
+" @vimlint(EVL103, 0, a:ch)
+
+function! SpaceVim#api#web#http#get() abort
+    return deepcopy(s:self)
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:set et:
diff --git a/autoload/SpaceVim/api/web/xml.vim b/autoload/SpaceVim/api/web/xml.vim
new file mode 100644
index 000000000..b6317ffdf
--- /dev/null
+++ b/autoload/SpaceVim/api/web/xml.vim
@@ -0,0 +1,327 @@
+let s:save_cpo = &cpo
+set cpo&vim
+
+let s:self = {}
+let s:HTTP = SpaceVim#api#import('web#http')
+
+let s:template = { 'name': '', 'attr': {}, 'child': [] }
+
+function! s:nr2byte(nr) abort
+    if a:nr < 0x80
+        return nr2char(a:nr)
+    elseif a:nr < 0x800
+        return nr2char(a:nr/64+192).nr2char(a:nr%64+128)
+    else
+        return nr2char(a:nr/4096%16+224).nr2char(a:nr/64%64+128).nr2char(a:nr%64+128)
+    endif
+endfunction
+
+function! s:nr2enc_char(charcode) abort
+    if &encoding == 'utf-8'
+        return nr2char(a:charcode)
+    endif
+    let char = s:nr2byte(a:charcode)
+    if strlen(char) > 1
+        let char = strtrans(iconv(char, 'utf-8', &encoding))
+    endif
+    return char
+endfunction
+
+function! s:nr2hex(nr) abort
+    let n = a:nr
+    let r = ""
+    while n
+        let r = '0123456789ABCDEF'[n % 16] . r
+        let n = n / 16
+    endwhile
+    return r
+endfunction
+
+function! s:decodeEntityReference(str, ...) abort
+    let str = a:str
+    let str = substitute(str, '&gt;', '>', 'g')
+    let str = substitute(str, '&lt;', '<', 'g')
+    if get(g:, 'webapi#xml#decodeAsHTML', 0)
+        let str = substitute(str, '&quot;', '"', 'g')
+        let str = substitute(str, '&apos;', "'", 'g')
+        let str = substitute(str, '&nbsp;', ' ', 'g')
+        let str = substitute(str, '&yen;', '\&#65509;', 'g')
+    endif
+    let str = substitute(str, '&#x\([0-9a-fA-F]\+\);', '\=s:nr2enc_char("0x".submatch(1))', 'g')
+    let str = substitute(str, '&#\(\d\+\);', '\=s:nr2enc_char(submatch(1))', 'g')
+    let str = substitute(str, '&amp;', '\&', 'g')
+    return str
+endfunction
+
+function! s:encodeEntityReference(str) abort
+    let str = a:str
+    let str = substitute(str, '&', '\&amp;', 'g')
+    let str = substitute(str, '>', '\&gt;', 'g')
+    let str = substitute(str, '<', '\&lt;', 'g')
+    let str = substitute(str, '"', '\&#34;', 'g')
+    "let str = substitute(str, "\n", '\&#x0d;', 'g')
+    "let str = substitute(str, '"', '&quot;', 'g')
+    "let str = substitute(str, "'", '&apos;', 'g')
+    "let str = substitute(str, ' ', '&nbsp;', 'g')
+    return str
+endfunction
+
+function! s:matchNode(node, cond) abort
+    if type(a:cond) == 1 && a:node.name == a:cond
+        return 1
+    endif
+    if type(a:cond) == 2
+        return a:cond(a:node)
+    endif
+    if type(a:cond) == 3
+        let ret = 1
+        for l:R in a:cond
+            if !s:matchNode(a:node, l:R) | let ret = 0 | endif
+            unlet l:R
+        endfor
+        return ret
+    endif
+    if type(a:cond) == 4
+        for k in keys(a:cond)
+            if has_key(a:node.attr, k) && a:node.attr[k] == a:cond[k] | return 1 | endif
+        endfor
+    endif
+    return 0
+endfunction
+
+function! s:template.childNode(...) dict abort
+    for c in self.child
+        if type(c) == 4 && s:matchNode(c, a:000)
+            return c
+        endif
+        unlet c
+    endfor
+    return {}
+endfunction
+
+function! s:template.childNodes(...) dict abort
+    let ret = []
+    for c in self.child
+        if type(c) == 4 && s:matchNode(c, a:000)
+            let ret += [c]
+        endif
+        unlet c
+    endfor
+    return ret
+endfunction
+
+function! s:template.value(...) dict abort
+    if a:0
+        let self.child = a:000
+        return
+    endif
+    let ret = ''
+    for c in self.child
+        if type(c) <= 1 || type(c) == 5
+            let ret .= c
+        elseif type(c) == 4
+            let ret .= c.value()
+        endif
+        unlet c
+    endfor
+    return ret
+endfunction
+
+function! s:template.find(...) dict abort
+    for c in self.child
+        if type(c) == 4
+            if s:matchNode(c, a:000)
+                return c
+            endif
+            unlet! ret
+            let ret = c.find(a:000)
+            if !empty(ret)
+                return ret
+            endif
+        endif
+        unlet c
+    endfor
+    return {}
+endfunction
+
+function! s:template.findAll(...) dict abort
+    let ret = []
+    for c in self.child
+        if type(c) == 4
+            if s:matchNode(c, a:000)
+                call add(ret, c)
+            endif
+            let ret += c.findAll(a:000)
+        endif
+        unlet c
+    endfor
+    return ret
+endfunction
+
+function! s:template.toString() dict abort
+    let xml = '<' . self.name
+    for attr in keys(self.attr)
+        let xml .= ' ' . attr . '="' . s:encodeEntityReference(self.attr[attr]) . '"'
+    endfor
+    if len(self.child)
+        let xml .= '>'
+        for c in self.child
+            if type(c) == 4
+                let xml .= c.toString()
+            elseif type(c) > 1
+                let xml .= s:encodeEntityReference(string(c))
+            else
+                let xml .= s:encodeEntityReference(c)
+            endif
+            unlet c
+        endfor
+        let xml .= '</' . self.name . '>'
+    else
+        let xml .= ' />'
+    endif
+    return xml
+endfunction
+
+function! webapi#xml#createElement(name) abort
+    let node = deepcopy(s:template)
+    let node.name = a:name
+    return node
+endfunction
+
+function! s:parse_tree(ctx, top) abort
+    let node = a:top
+    let stack = [a:top]
+    let pos = 0
+    " content accumulates the text only tags
+    let content = ""
+    let append_content_to_parent = 'if len(stack) && content != "" | call add(stack[-1].child, content) | let content ="" | endif'
+
+    let mx = '^\s*\(<?xml[^>]\+>\)'
+    if a:ctx['xml'] =~ mx
+        let match = matchstr(a:ctx['xml'], mx)
+        let a:ctx['xml'] = a:ctx['xml'][stridx(a:ctx['xml'], match) + len(match):]
+        let mx = 'encoding\s*=\s*["'']\{0,1}\([^"'' \t]\+\|[^"'']\+\)["'']\{0,1}'
+        let matches = matchlist(match, mx)
+        if len(matches)
+            let encoding = matches[1]
+            if len(encoding) && len(a:ctx['encoding']) == 0
+                let a:ctx['encoding'] = encoding
+                let a:ctx['xml'] = iconv(a:ctx['xml'], encoding, &encoding)
+            endif
+        endif
+    endif
+
+    " this regex matches
+    " 1) the remaining until the next tag begins
+    "    2) maybe closing "/" of tag name
+    "    3)  tagname
+    "    4) the attributes of the text (optional)
+    "    5) maybe closing "/" (end of tag name)
+    " or
+    "    6) CDATA or ''
+    "    7) text content of CDATA
+    " 8) the remaining text after the tag (rest)
+    " (These numbers correspond to the indexes in matched list m)
+    let tag_mx = '^\(\_.\{-}\)\%(\%(<\(/\?\)\([^!/>[:space:]]\+\)\(\%([[:space:]]*[^/>=[:space:]]\+[[:space:]]*=[[:space:]]*\%([^"'' >\t]\+\|"[^"]*"\|''[^'']*''\)\|[[:space:]]\+[^/>=[:space:]]\+[[:space:]]*\)*\)[[:space:]]*\(/\?\)>\)\|\%(<!\[\(CDATA\)\[\(.\{-}\)\]\]>\)\|\(<!--.\{-}-->\)\)'
+
+    while len(a:ctx['xml']) > 0
+        let m = matchlist(a:ctx.xml, tag_mx)
+        if empty(m) | break | endif
+        let a:ctx.xml = a:ctx.xml[len(m[0]) :]
+        let is_end_tag = m[2] == '/' && m[5] == ''
+        let is_start_and_end_tag = m[2] == '' && m[5] == '/'
+        let tag_name = m[3]
+        let attrs = m[4]
+
+        if len(m[1])
+            let content .= s:decodeEntityReference(m[1])
+        endif
+
+        if is_end_tag
+            " closing tag: pop from stack and continue at upper level
+            exec append_content_to_parent
+
+            if len(stack) " TODO: checking whether opened tag is exist. 
+                call remove(stack, -1)
+            endif
+            continue
+        endif
+
+        " comment tag
+        if m[8] != ''
+            continue
+        endif
+
+        " if element is a CDATA
+        if m[6] != ''
+            let content .= m[7]
+            continue
+        endif
+
+        let node = deepcopy(s:template)
+        let node.name = tag_name
+        let attr_mx = '\([^=[:space:]]\+\)\s*\%(=\s*''\([^'']*\)''\|=\s*"\([^"]*\)"\|=\s*\(\w\+\)\|\)'
+        while len(attrs) > 0
+            let attr_match = matchlist(attrs, attr_mx)
+            if len(attr_match) == 0
+                break
+            endif
+            let name = attr_match[1]
+            let value = len(attr_match[2]) ? attr_match[2] : len(attr_match[3]) ? attr_match[3] : len(attr_match[4]) ? attr_match[4] : ""
+            if value == ""
+                let value = name
+            endif
+            let node.attr[name] = s:decodeEntityReference(value)
+            let attrs = attrs[stridx(attrs, attr_match[0]) + len(attr_match[0]):]
+        endwhile
+
+        exec append_content_to_parent
+
+        if len(stack)
+            call add(stack[-1].child, node)
+        endif
+        if !is_start_and_end_tag
+            " opening tag, continue parsing its contents
+            call add(stack, node)
+        endif
+    endwhile
+endfunction
+
+
+function! s:self.parse(xml) abort
+    let top = deepcopy(s:template)
+    let oldmaxmempattern=&maxmempattern
+    let oldmaxfuncdepth=&maxfuncdepth
+    let &maxmempattern=2000000
+    let &maxfuncdepth=2000
+    "try
+    call s:parse_tree({'xml': a:xml, 'encoding': ''}, top)
+    for node in top.child
+        if type(node) == 4
+            return node
+        endif
+        unlet node
+    endfor
+    "catch /.*/
+    "endtry
+    let &maxmempattern=oldmaxmempattern
+    let &maxfuncdepth=oldmaxfuncdepth
+    throw "Parse Error"
+endfunction
+
+function! s:self.parseFile(file) abort
+    return self.parse(join(readfile(a:file), "\n"))
+endfunction
+
+function! s:self.parseURL(url) abort
+    return self.parse(s:HTTP.get(a:url).content)
+endfunction
+
+function! SpaceVim#api#web#xml#get()
+    return deepcopy(s:self)
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:set et sw=2 cc=80: