我实际上是在这里回答我自己的问题.
我必须是世界上唯一一个试图这样做的人,但考虑到我用了大约一个星期的时间来解决这个问题 – 我想如果有另一个人想在Unity中使用XML(-RPC) – 我会拯救他们一周的麻烦.
我想做的是与我们的一个游戏服务器谈谈排行榜等事情.这台服务器“会谈”XML-RPC,我很快发现在Unity中这并不容易.
构建XML以发送到我们的服务器
我没有在Unity中找到标准函数来执行此操作而不会增加大量开销.所以我建立了以下程序.
public string buildXMLRPCRequest(Hashtable FieldArray,string MethodName)
{
string ReturnString = "";
ReturnString += "<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>" +
"\n" + "<simpleRPC version=\"0.9\">" +
"\n" + "<methodCall>" +
"\n" + "<methodName>" + MethodName + "</methodName>" +
"\n" + "<vector type=\"struct\">";
ReturnString += buildNode(FieldArray);
ReturnString += "\n</vector>" +
"\n</methodCall>" +
"\n</simpleRPC>";
return ReturnString;
}
public string buildNode(Hashtable FieldArray)
{
string ReturnList = "";
foreach (DictionaryEntry Item in FieldArray) {
string TypeName = "int";
string NodeType = "scalar";
Type myType = Item.Value.GetType();
string fieldValue = "";
if (myType == typeof(string) ) {
TypeName = "string";
fieldValue = Item.Value.ToString();
}
if (myType == typeof(Hashtable) ) {
fieldValue = buildNode(Item.Value as Hashtable);
NodeType = "vector";
TypeName = "struct";
}
if (myType == typeof(int) ) {
fieldValue = Item.Value.ToString();
TypeName = "int";
}
var ThisNode = "\n<" + NodeType + " type=\"" + TypeName + "\" id=\"" + Item.Key + "\">" + fieldValue + "</" + NodeType + ">";
ReturnList += ThisNode;
}
return ReturnList;
}
buildXMLRPCRequest用于构建XML.您可以使用要编码的字段来处理HashTable,其中可能包含以下类型的对象：int,string或Hashtable.它将返回一个精美格式化的(简单)XML-RPC字符串,该字符串已准备好发送到我们的服务器.
发送
要将XML发送到我们的服务器,您需要发出一个POST请求,其mime类型设置为text / xml. Unity中不能使用任何标准C#方法,但使用buildXMLRPCRequest逻辑的输出可以很好地工作.它能做什么：
在Unity中发送
我用过这段代码：
private void UnityPostXML( int Staging,string WebServer,string MethodName,Hashtable FieldArray)
{
string WebServiceURL = "http://LIVESERVER/";
if (Staging == 1) {
WebServiceURL = "http://TESTSERVER";
}
// Encode the text to a UTF8 byte arrray
string XMLRequest = buildXMLRPCRequest(FieldArray,MethodName);
System.Text.Encoding enc = System.Text.Encoding.UTF8;
byte[] myByteArray = enc.GetBytes(XMLRequest);
// Get the Unity WWWForm object (a post version)
var form = new WWWForm();
var url = WebServiceURL;
// Add a custom header to the request.
// Change the content type to xml and set the character set
var headers = form.headers;
headers["Content-Type"]="text/xml;charset=UTF-8";
// Post a request to an URL with our rawXMLData and custom headers
var www = new WWW(WebServiceURL,myByteArray,headers);
// Start a co-routine which will wait until our servers comes back
StartCoroutine(WaitForRequest(www));
}
IEnumerator WaitForRequest(WWW www)
{
yield return www;
// check for errors
if (www.error == null)
{
Debug.Log("WWW Ok!: " + www.text);
} else {
Debug.Log("WWW Error: "+ www.error);
}
}
>使用UTF8将XML编码为ByteArray
>创建一个新的Unity WWWForm
>创建一个HashTable,存储当前的http标头(如果有的话)并将内容类型覆盖为text / xml
>将该批次发送到服务器
>设置一个等待回复的协同程序
没有Unity发送
我发现在C#中开发一个库(我使用MonoDevelop的标准版本)比使用Unity更简单,所以如果wnat做同样的事情,那么C#中的equivelant发送逻辑就会低于它.
private string NormalXMLCall(int Staging,Hashtable Fields)
{
// Figure out who to call
string WebServiceURL = "http://LIVSERVER";
if (Staging == 1) {
WebServiceURL = "http://TESTSERVER";
}
WebServiceURL += WebServer;
// Build the request
XmlRpcParser parser = new XmlRpcParser();
string XMLRequest = parser.buildXMLRPCRequest(Fields,MethodName);
// Fire it off
HttpWebRequest httpRequest =(HttpWebRequest)WebRequest.Create(WebServiceURL);
httpRequest.Method = "POST";
//Defining the type of the posted data as XML
httpRequest.ContentType = "text/xml";
// string data = xmlDoc.InnerXml;
byte[] bytedata = Encoding.UTF8.GetBytes(XMLRequest);
// Get the request stream.
Stream requestStream = httpRequest.GetRequestStream();
// Write the data to the request stream.
requestStream.Write(bytedata,bytedata.Length);
requestStream.Close();
//Get Response
HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse();
// Get the stream associated with the response.
Stream receiveStream = httpResponse.GetResponseStream ();
// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader (receiveStream,Encoding.UTF8);
string ReceivedData = readStream.ReadToEnd ();
httpResponse.Close ();
readStream.Close ();
return ReceivedData;
}
}
从XML中提取数据
我写了一个简单的解析器.应为下面的findNode函数的构造函数提供原始XML数据和要查找的子节点对象.如果该节点可以在XML字符串的最高级别找到,则它将返回该节点的值(作为字符串),如果找不到,则返回null.此解析器特定于“Simple XML-RPC”,需要一些工作来解码编码字符,但这应该很容易添加.
public string findNode(string Xml,string SearchForTag) {
int NestCounter = 0;
bool FoundTag = false;
int FoundTagLevel = 0;
string ReturnValue = null;
// Break it down by "<"
string [] TagArray = Xml.Split('<');
for (int i=0;i<TagArray.Length;i++) {
if (i>175 && i<180) {
int Hello=1;
}
string ThisLine = "<" + TagArray[i];
if (ThisLine.Length <= 1) continue;
if ((ThisLine.Length >= 2) && (ThisLine.Substring(0,2) == "<?")) continue;
if ((ThisLine.Length >= 3) && (ThisLine.Substring(0,3) == "<--")) continue;
// It can be a vector or a scalar - vectors are full of scalars so we'll
ThisLine = ThisLine.Replace(" "," ");
ThisLine = ThisLine.Replace("</","</");
string [] FieldArray = ThisLine.Split(' ');
bool AddLineToResult = FoundTag;
// Nest counter is the level we are operating on. We only check the first
// Level. When a vector is found we increase the NestCount and we won't
// search for the ID
if (NestCounter <= 1) { // Initial array we are looking on level 1
for (int a=0;a<FieldArray.Length;a++) {
string ThisTag = FieldArray[a];
string [] TagValue = ThisTag.Split("=\"".tocharArray(),5);
// Every TagValue is xx=yy pair... we want "ID=\"xxx\"
if (TagValue.Length >= 3) {
string TagName = TagValue[2];
if (TagName == SearchForTag) {
FoundTag = true;
FoundTagLevel = NestCounter;
// This could be a vector or Scalar so find the ">" in this string
// and start adding from there
int TerminatePos = ThisLine.IndexOf(">");
if ((TerminatePos >= 0) && (TerminatePos < ThisLine.Length)) {
ReturnValue = ThisLine.Substring(TerminatePos+1);
}
break;
}
}
}
}
if (FieldArray.Length > 0) {
string ThisField = FieldArray[0].ToLower();
/*
* If we are in the loop where we have found the tag,* we haven't changed level and this is the end of a scalar it must
* mean that the tag was a scalar so we can safely leave now.
*/
if ((FoundTag) && (FoundTagLevel == NestCounter) && (ThisField == "</scalar>")) {
break;
// return ReturnValue;
}
// If we end or leave a vector we change the NestCounter
if (ThisField.IndexOf("<vector") >= 0) {
NestCounter++;
}
else if (ThisField.IndexOf("</vector>") >= 0) {
NestCounter--;
}
}
// If we have found our tag and the nest counte goes below the level
// we where looking at - it's time to leave
if (FoundTag) {
if (NestCounter <= FoundTagLevel) {
break;
//return ReturnValue;
}
}
if (AddLineToResult) {
ReturnValue += ThisLine;
}
}
// You may wanna do some url decoding here....
return ReturnValue;
}
