內蒙古java團隊

http://hostname/mapGuide/mapagent.fcig?OPERATION=EnumerateResources&VERSION=1.0.0& RESOURCEID=Library:// &TYPE=FeatureSource&DEPTH=3

服務器擴展模塊

源代碼位置

isapi_MapAgent.dll

\Web\src\IsapiAgent

MapAgent.exe

\Web\src\CgiAgent

mod_mgmapagent.so

\Web\src\ApacheAgent

DWORD WINAPI HttpExtensionProc(EXTENSION_CONTROL_BLOCK *pECB)

{

Initialize(pECB);

// 調用GetServerVariable讀取諸如服務器名稱、端口號等服務器變量信息

......

// 創建MgHttpRequest的實例，用于處理HTTP請求

Ptr request = new MgHttpRequest(wUrl);

// 解析HTTP請求中的參數，并且將這些參數置入MgHttpRequest對象中

Ptr params = request->GetRequestParam();

......

IsapiPostParser postParser(pECB);

postParser.Parse(params);

......

// 創建IsapiResponseHandler的實例，用于將響應請求返回給客戶端

IsapiResponseHandler responseHandler(pECB);

......

// 將HTTP請求轉發給MapGuide服務器，當MapGuide服務器處理完這個請求，

// 將請求結果返回給Web擴展之后，這個方法會返回一個MgHttpResponse對象，

// 它表示HTTP請求的響應結果。

Ptr response = request->Execute();

// 將響應結果返回給客戶端

responseHandler.SendResponse(response);

......

}

MgHttpResponse* MgHttpRequest::Execute()

{

Ptr hResponse;

Ptr result;

// 創建MgHttpResponse對象，用于返回HTTP請求響應結果

hResponse = new MgHttpResponse();

result = hResponse->GetResult();

// 獲得HTTP請求中參數“OPERATION”的值

STRING sParamValue = m_requestParam->GetParameterValue(MgHttpResourceStrings::reqOperation);

......

// 根據參數“OPERATION”的值取得對應操作的請求響應處理器

Ptr rrHandler =

CreateRequestResponseHandler(sParamValue, result);

.......

// 處理HTTP請求

if(rrHandler != NULL) rrHandler->Execute(*hResponse);

......

// 返回響應結果

return SAFE_ADDREF((MgHttpResponse*)hResponse);

}

// 定義一個全局map對象，用于存放每種操作對應的請求響應處理器類對象

static map

httpClassCreators;

bool InitializeStaticData()

{

httpClassCreators[MgHttpResourceStrings::opGetMap] =

MgHttpGetMap::CreateObject;

httpClassCreators[MgHttpResourceStrings::opGetMapUpdate] =

MgHttpGetMapUpdate::CreateObject;

httpClassCreators[MgHttpResourceStrings::opGetDrawing] =

MgHttpGetDrawing::CreateObject;

......

httpClassCreators[MgHttpResourceStrings::opDescribeDrawing] = MgHttpDescribeDrawing::CreateObject;

httpClassCreators[MgHttpResourceStrings::opEnumerateResources] = MgHttpEnumerateResources::CreateObject;

......

}

void MgHttpEnumerateResources::Execute(MgHttpResponse& hResponse)

{

Ptr hResult;

hResult = hResponse.GetResult();

// 檢查HTTP請求中的參數

ValidateCommonParameters();

// 創建MgProxyResourceService實例

Ptr mgprService =

(MgResourceService*)(CreateService(MgServiceType::ResourceService));

......

// 執行枚舉資源操作

Ptr byteReader = mgprService->

EnumerateResources(&mgrIdentifier, m_depth, m_type, m_computeChildren);

// 如果需要，轉換響應請求的格式

ProcessFormatConversion(byteReader);

// 將操作結果放入響應請求中的MgHttpResult對象

hResult->SetResultObject(byteReader, byteReader->GetMimeType());

}

MgByteReader* MgProxyResourceService::EnumerateResources(

MgResourceIdentifier* resource, INT32 depth, CREFSTRING type,

INT32 properties, CREFSTRING fromDate, CREFSTRING toDate,

bool computeChildren)

{

MgCommand cmd;

cmd.ExecuteCommand(m_connProp,

MgCommand::knObject,

MgResourceService::opIdEnumerateResources,

7,

Resource_Service,

BUILD_VERSION(1,0,0),

MgCommand::knObject, resource,

MgCommand::knInt32, depth,

MgCommand::knString, &type,

MgCommand::knInt32, properties,

MgCommand::knString, &fromDate,

MgCommand::knString, &toDate,

MgCommand::knInt8, (int)computeChildren,

MgCommand::knNone);

SetWarning(cmd.GetWarningObject());

return (MgByteReader*)cmd.GetReturnValue().val.m_obj;

}