When using the IIS adaptor, the performance degrades under certain conditions. These conditions cause large amounts of memory to be allocated for each request resulting in poor response times and OutOfMemoryExceptions.
Note: This happens whenever the ISAPI adaptor is used, even when your applications are used on another computer with a different operating system.
Solution
How to apply the code patch
2. In the Adaptor subproject, locate the files request.h and request.c
3. Make the following code modifications to the files request.h and request.c
In request.h, search for #include "WOURLCUtilities.h" and add the following line below it:
#include "wastring.h"
File request.c
In request.c, search for the beginning of the method 'int req_sendRequest' (around line 217). Be careful not to delete this original method 'int req_sendRequest'. Add the following code block before the original method 'int req_sendRequest':
#ifdef WIN32
static void req_appendHeader(const char *key, const char *val, String *headers) {
int valLength = strlen(val);
while (val[valLength - 1] == '\\r' || val[valLength - 1] == '\\n') {
valLength--;
}
str_append(headers, key);
str_appendLiteral(headers, ": ");
str_appendLength(headers, val, valLength);
str_appendLiteral(headers, "\\r\\n");
}
int req_sendRequest(HTTPRequest *req, net_fd socket) {
struct iovec *buffers;
int bufferCount, result;
String *headersString;
buffers = WOMALLOC(3 * sizeof(struct iovec));
headersString = str_create(req->request_str, 0);
if (headersString) {
st_perform(req->headers, (st_perform_callback)req_appendHeader, headersString);
}
buffers[0].iov_base = headersString->text;
buffers[0].iov_len = headersString->length;
buffers[1].iov_base = "\\r\\n";
buffers[1].iov_len = 2;
bufferCount = 2;
if (req->content_length > 0) {
bufferCount++;
buffers[2].iov_base = req->content;
buffers[2].iov_len = req->content_length;
}
result = transport->sendBuffers(socket, buffers, bufferCount);
str_free(headersString);
WOFREE(buffers);
if (result == 0)
result = transport->flush_connection(socket);
else
WOLog(WO_ERR, "error sending request");
return result;
}
#else
// End of the code to be added to request.c
After the #else comes the original req_sendRequest method.
Go to the end of this method and insert #endif on the next line after the closing brace.
4. Compile the adaptor.
The makefile expects the OS environment variable to be either empty or contain the string 'WINDOWS'.
You can explicitly set the OS variable in a Bourne shell using the following:
cd $NEXT_ROOT/Developer/Examples/WebObjects/Source/Adaptors
set OS=WINDOWS
make clean
make
make IIS
Notes:
After compilation, the two files WebObjects.EXE (located in $NEXT_ROOT/Developer/Examples/WebObjects/Source/Adaptors/CGI) and WebObjects.DLL (located in $NEXT_ROOT/Developer/Examples/WebObjects/Source/Adaptors/IIS) should be copied to the proper location. Change c:\\inetpub to match your system.
In a Bourne shell, do the following:
cd $NEXT_ROOT/Developer/Examples/WebObjects/Source/Adaptors
net stop w3svc
cp cgi/webobjects.exe c:/inetpub/scripts
cp iis/webobjects.dll c:/inetpub/scripts
net start w3svc
Stopping IIS before copying prevents possible sharing violations for the ISAPI adaptor since you cannot overwrite the file if it has already been loaded by IIS.