XML de HTTP

Analiza una solicitud HTTP que incluye contenido de "application/xml".

Muestra de código

C++

#include <google/cloud/functions/http_request.h>
#include <google/cloud/functions/http_response.h>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
#include <sstream>

namespace gcf = ::google::cloud::functions;

gcf::HttpResponse http_xml(gcf::HttpRequest request) {  // NOLINT
  std::istringstream is(request.payload());
  // Use the Boost.PropertyTree XML parser, this is adequate for a small
  // example, but application developers may want to consider a more robust
  // parser for production code.
  boost::property_tree::ptree data;
  boost::property_tree::read_xml(is, data);

  auto name = data.get<std::string>("name", "World");
  return gcf::HttpResponse{}
      .set_header("content-type", "text/plain")
      .set_payload("Hello " + name);
}

Go


// Package http provides a set of HTTP Cloud Functions samples.
package http

import (
	"encoding/xml"
	"fmt"
	"html"
	"io/ioutil"
	"net/http"
)

// ParseXML is an example of parsing a text/xml request.
func ParseXML(w http.ResponseWriter, r *http.Request) {
	var d struct {
		Name string
	}
	b, err := ioutil.ReadAll(r.Body)
	if err != nil {
		http.Error(w, "Could not read request", http.StatusBadRequest)
	}
	if err := xml.Unmarshal(b, &d); err != nil {
		http.Error(w, "Could not parse request", http.StatusBadRequest)
	}
	if d.Name == "" {
		d.Name = "World"
	}
	fmt.Fprintf(w, "Hello, %v!", html.EscapeString(d.Name))
}

Java

import com.google.cloud.functions.HttpFunction;
import com.google.cloud.functions.HttpRequest;
import com.google.cloud.functions.HttpResponse;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

public class ParseXml implements HttpFunction {
  private static DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

  // Parses a HTTP request in XML format
  // (Responds with a 400 error if the HTTP request isn't valid XML.)
  @Override
  public void service(HttpRequest request, HttpResponse response)
      throws IOException, ParserConfigurationException {

    try {
      DocumentBuilder docBuilder = dbFactory.newDocumentBuilder();
      var writer = new PrintWriter(response.getWriter());

      // Get request body
      InputStream bodyStream = new ByteArrayInputStream(
          request.getInputStream().readAllBytes());

      // Parse + process XML
      Document doc = docBuilder.parse(bodyStream);
      writer.printf("Root element: %s", doc.getDocumentElement().getNodeName());
    } catch (SAXException e) {
      response.setStatusCode(HttpURLConnection.HTTP_BAD_REQUEST);
      return;
    }
  }
}

Node.js

/**
 * Parses a document of type 'text/xml'
 *
 * @param {Object} req Cloud Function request context.
 * @param {Object} res Cloud Function response context.
 */
exports.parseXML = (req, res) => {
  // Convert the request to a Buffer and a string
  // Use whichever one is accepted by your XML parser
  const data = req.rawBody;
  const xmlData = data.toString();

  const {parseString} = require('xml2js');

  parseString(xmlData, (err, result) => {
    if (err) {
      console.error(err);
      res.status(500).end();
      return;
    }
    res.send(result);
  });
};

Python

import json
import xmltodict

def parse_xml(request):
    """ Parses a document of type 'text/xml'
    Args:
        request (flask.Request): The request object.
    Returns:
        The response text, or any set of values that can be turned into a
         Response object using `make_response`
        <http://flask.pocoo.org/docs/1.0/api/#flask.Flask.make_response>.
    """
    data = xmltodict.parse(request.data)
    return json.dumps(data, indent=2)

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