import opts
import dom
+import curl
+import pthreads
# Natural Language Processor
#
# ~~~
init from_xml(xml: XMLStartTag) do
var index = xml.attributes.first.as(XMLStringAttr).value.to_i
- var word = xml["word"].first.as(XMLStartTag).data
- var lemma = xml["lemma"].first.as(XMLStartTag).data
- var begin_offset = xml["CharacterOffsetBegin"].first.as(XMLStartTag).data.to_i
- var end_offset = xml["CharacterOffsetEnd"].first.as(XMLStartTag).data.to_i
- var pos = xml["POS"].first.as(XMLStartTag).data
+ var word = read_data(xml, "word")
+ var lemma = read_data(xml, "lemma")
+ var begin_offset = read_data(xml, "CharacterOffsetBegin").to_i
+ var end_offset = read_data(xml, "CharacterOffsetEnd").to_i
+ var pos = read_data(xml, "POS")
init(index, word, lemma, begin_offset, end_offset, pos)
end
+
+ private fun read_data(xml: XMLStartTag, tag_name: String): String do
+ var res = ""
+ if xml[tag_name].is_empty then return res
+ var first = xml[tag_name].first
+ if not first isa XMLStartTag then return res
+ var data = first.data
+ if data == null then return res
+ return data
+ end
+end
+
+# Stanford web server
+#
+# Runs the server on `port`.
+#
+# For more details about the stanford NLP server see
+# https://stanfordnlp.github.io/CoreNLP/corenlp-server.html
+class NLPServer
+ super Thread
+
+ # Stanford jar classpath
+ #
+ # Classpath to give to Java when loading the StanfordNLP jars.
+ var java_cp: String
+
+ # Port the Java server will listen on
+ var port: Int
+
+ redef fun main do
+ sys.system "java -mx4g -cp \"{java_cp}\" edu.stanford.nlp.pipeline.StanfordCoreNLPServer -port {port.to_s} -timeout 15000"
+ return null
+ end
+end
+
+# A NLPProcessor using a NLPServer as backend
+class NLPClient
+ super NLPProcessor
+
+ # Base uri of the NLP server API
+ #
+ # For examples "http://localhost:9000" or "https://myserver.com"
+ var api_uri: String
+
+ # Annotators to use
+ #
+ # The specified annotators must exist on the server.
+ #
+ # Defaults are: `tokenize`, `ssplit`, `pos` and `lemma`.
+ var annotators: Array[String] = ["tokenize", "ssplit", "pos", "lemma"] is writable
+
+ # Language to process
+ #
+ # The language must be available on the server.
+ #
+ # Default is `en`.
+ var language = "en" is writable
+
+ # Output format to ask.
+ #
+ # Only `xml` is implemented at the moment.
+ private var format = "xml"
+
+ # API uri used to build curl POST requests
+ fun post_uri: String do
+ return "{api_uri}/?properties=%7B%22annotators%22%3A%20%22tokenize%2Cssplit%2Cpos%2clemma%22%2C%22outputFormat%22%3A%22{format}%22%7D&pipelineLanguage={language}"
+ end
+
+ redef fun process(string) do
+ var request = new CurlHTTPRequest(post_uri)
+ request.body = string
+ var response = request.execute
+ if response isa CurlResponseSuccess then
+ if response.status_code != 200 then
+ print "Error: {response.body_str}"
+ return new NLPDocument
+ end
+ var xml = response.body_str.to_xml
+ if xml isa XMLError then
+ print xml
+ end
+ return new NLPDocument.from_xml(response.body_str.to_xml.as(XMLDocument))
+ else if response isa CurlResponseFailed then
+ print "Error: {response.error_msg}"
+ return new NLPDocument
+ end
+ return new NLPDocument
+ end
end