NimYAML/server/server.nim

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# NimYAML - YAML implementation in Nim
# (c) Copyright 2015 Felix Krause
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
import jester, asyncdispatch, json, streams
import yaml
routes:
get "/":
headers["Content-Type"] = "text/plain"
resp "I am a friendly NimYAML parser webservice."
post "/":
var
style: PresentationStyle
resultNode = newJObject()
tokens = false
headers["Access-Control-Allow-Origin"] = "*"
headers["Pragma"] = "no-cache"
headers["Cache-Control"] = "no-cache"
headers["Expires"] = "0"
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try:
case @"style"
of "minimal": style = psMinimal
of "canonical": style = psCanonical
of "default": style = psDefault
of "json": style = psJson
of "block": style = psBlockOnly
of "tokens":
var
output = ""
parser = newYamlParser()
events = parser.parse(newStringStream(@"input"))
for event in events:
output.add($event & "\n")
resultNode["code"] = %0
resultNode["output"] = %output
resp resultNode.pretty, "application/json"
tokens = true
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if not tokens:
var output = newStringStream()
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transform(newStringStream(@"input"), output,
defineOptions(style))
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resultNode["code"] = %0
resultNode["output"] = %output.data
resp resultNode.pretty, "application/json"
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except YamlParserError:
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let e = (ref YamlParserError)(getCurrentException())
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resultNode["code"] = %1
resultNode["line"] = %e.line
resultNode["column"] = %e.column
resultNode["message"] = %e.msg
resultNode["detail"] = %e.lineContent
resp resultNode.pretty, "application/json"
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except YamlPresenterJsonError:
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let e = getCurrentException()
resultNode["code"] = %2
resultNode["message"] = %e.msg
headers["Content-Type"] = "application/json"
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resp resultNode.pretty, "application/json"
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except:
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let e = getCurrentException()
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let msg = "Name: " & $e.name & "\nMessage: " & e.msg &
"\nTrace:\n" & e.getStackTrace
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resp Http500, msg, "text/plain;charset=utf-8"
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runForever()