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148 lines (132 loc) · 4.7 KB
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package org.json;
/*
Public Domain.
*/
import java.util.Locale;
/**
* Convert an HTTP header to a JSONObject and back.
* @author JSON.org
* @version 2015-12-09
*/
public class HTTP {
/**
* Constructs a new HTTP object.
*/
public HTTP() {
}
/** Carriage return/line feed. */
public static final String CRLF = "\r\n";
/**
* Convert an HTTP header string into a JSONObject. It can be a request
* header or a response header. A request header will contain
* <pre>{
* Method: "POST" (for example),
* "Request-URI": "/" (for example),
* "HTTP-Version": "HTTP/1.1" (for example)
* }</pre>
* A response header will contain
* <pre>{
* "HTTP-Version": "HTTP/1.1" (for example),
* "Status-Code": "200" (for example),
* "Reason-Phrase": "OK" (for example)
* }</pre>
* In addition, the other parameters in the header will be captured, using
* the HTTP field names as JSON names, so that <pre>{@code
* Date: Sun, 26 May 2002 18:06:04 GMT
* Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s
* Cache-Control: no-cache}</pre>
* become
* <pre>{@code
* Date: "Sun, 26 May 2002 18:06:04 GMT",
* Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s",
* "Cache-Control": "no-cache",
* ...}</pre>
* It does no further checking or conversion. It does not parse dates.
* It does not do '%' transforms on URLs.
* @param string An HTTP header string.
* @return A JSONObject containing the elements and attributes
* of the XML string.
* @throws JSONException if a called function fails
*/
public static JSONObject toJSONObject(String string) throws JSONException {
JSONObject jo = new JSONObject();
HTTPTokener x = new HTTPTokener(string);
String token;
token = x.nextToken();
if (token.toUpperCase(Locale.ROOT).startsWith("HTTP")) {
// Response
jo.put("HTTP-Version", token);
jo.put("Status-Code", x.nextToken());
jo.put("Reason-Phrase", x.nextTo('\0'));
x.next();
} else {
// Request
jo.put("Method", token);
jo.put("Request-URI", x.nextToken());
jo.put("HTTP-Version", x.nextToken());
}
// Fields
while (x.more()) {
String name = x.nextTo(':');
x.next(':');
jo.put(name, x.nextTo('\0'));
x.next();
}
return jo;
}
/**
* Convert a JSONObject into an HTTP header. A request header must contain
* <pre>{
* Method: "POST" (for example),
* "Request-URI": "/" (for example),
* "HTTP-Version": "HTTP/1.1" (for example)
* }</pre>
* A response header must contain
* <pre>{
* "HTTP-Version": "HTTP/1.1" (for example),
* "Status-Code": "200" (for example),
* "Reason-Phrase": "OK" (for example)
* }</pre>
* Any other members of the JSONObject will be output as HTTP fields.
* The result will end with two CRLF pairs.
* @param jo A JSONObject
* @return An HTTP header string.
* @throws JSONException if the object does not contain enough
* information.
*/
public static String toString(JSONObject jo) throws JSONException {
StringBuilder sb = new StringBuilder();
if (jo.has("Status-Code") && jo.has("Reason-Phrase")) {
sb.append(jo.getString("HTTP-Version"));
sb.append(' ');
sb.append(jo.getString("Status-Code"));
sb.append(' ');
sb.append(jo.getString("Reason-Phrase"));
} else if (jo.has("Method") && jo.has("Request-URI")) {
sb.append(jo.getString("Method"));
sb.append(' ');
sb.append('"');
sb.append(jo.getString("Request-URI"));
sb.append('"');
sb.append(' ');
sb.append(jo.getString("HTTP-Version"));
} else {
throw new JSONException("Not enough material for an HTTP header.");
}
sb.append(CRLF);
// Don't use the new entrySet API to maintain Android support
for (final String key : jo.keySet()) {
String value = jo.optString(key);
if (!"HTTP-Version".equals(key) && !"Status-Code".equals(key) &&
!"Reason-Phrase".equals(key) && !"Method".equals(key) &&
!"Request-URI".equals(key) && !JSONObject.NULL.equals(value)) {
sb.append(key);
sb.append(": ");
sb.append(jo.optString(key));
sb.append(CRLF);
}
}
sb.append(CRLF);
return sb.toString();
}
}