jdk/src/windows/bin/java-rmi.c
changeset 2 90ce3da70b43
child 5506 202f599c92aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/bin/java-rmi.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,165 @@
+/*
+ * Copyright 1996 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <process.h>
+
+/*
+ * This is a primitive bootstrapping utility for executing Java CGI
+ * programs, specifically Java RMI's CGI HTTP forwarding mechanism
+ *
+ * It executes the Java interpreter with options to define
+ * properties corresponding to the environment variables set by the
+ * CGI 1.0 specification and runs the target class.
+ *
+ * The following assumptions are made:
+ *     - the Java interpreter can be located by the system
+ *       PATH variable
+ *     - for RMI 1.1 prebeta release, the target class can be located
+ *       using the system CLASSPATH variable
+ */
+
+/* name of Java interpreter executable */
+#define JAVA_NAME "java"
+
+/* name of Java class to execute with interpreter */
+#define CLASS_NAME "sun.rmi.transport.proxy.CGIHandler"
+
+/* names of environment variables set in CGI 1.0 interface */
+static char *var_names[] = {
+    "AUTH_TYPE",
+    "CONTENT_LENGTH",
+    "CONTENT_TYPE",
+    "GATEWAY_INTERFACE",
+    "HTTP_ACCEPT",
+    "PATH_INFO",
+    "PATH_TRANSLATED",
+    "QUERY_STRING",
+    "REMOTE_ADDR",
+    "REMOTE_HOST",
+    "REMOTE_IDENT",
+    "REMOTE_USER",
+    "REQUEST_METHOD",
+    "SCRIPT_NAME",
+    "SERVER_NAME",
+    "SERVER_PORT",
+    "SERVER_PROTOCOL",
+    "SERVER_SOFTWARE"
+};
+
+#define NUM_VARS (sizeof(var_names) / sizeof(var_names[0]))
+
+/* file static functions */
+static void server_error(char *);
+
+/*
+ * Program entry point: set up arguments and invoke Java interpreter.
+ */
+int
+main(
+    int     argc,
+    char   *argv[]
+)
+{
+    int     i;                  /* loop index variable */
+    char  **args;               /* array to store arguments to interpreter */
+    int     n = 0;              /* next index to fill in argument array */
+
+    /* allocate space for argument list */
+    args = (char **)            /* allocate space for: */
+        malloc((1               /* executable name */
+                + NUM_VARS      /* property definition for each variable */
+                + 1             /* class name */
+                + 1)            /* terminating NULL */
+                * sizeof(*args));
+    if (args == NULL) {
+        server_error("memory allocation failure");
+        return 1;
+    }
+
+    /* first argument: name of java interpreter */
+    args[n ++] = JAVA_NAME;
+
+    /* next arguments: define CGI variables as properties to Java VM */
+    for (i = 0; i < NUM_VARS; ++ i) {
+        char *name = var_names[i];      /* name of variable */
+        char *value;                    /* value of variable */
+        char *buffer;                   /* buffer to store argument string */
+
+        value = getenv(name);
+        if (value == NULL)              /* if variable undefined, */
+            value = "";                 /* use empty string */
+
+        buffer = (char *)               /* allocate space for: */
+            malloc((2                   /* "-D" */
+                    + strlen(name)      /* variable name */
+                    + 2                 /* "=\"" */
+                    + strlen(value)     /* variable value */
+                    + 2)                /* "\"" and terminating '\0' */
+                    * sizeof(*buffer));
+        if (buffer == NULL) {
+            server_error("memory allocation failure");
+            return 1;
+        }
+
+        /* construct property definition parameter */
+        sprintf(buffer, "-D%s=\"%s\"", name, value);
+
+        args[n ++] = buffer;            /* add to argument list */
+    }
+
+    /* last argument: name of class to execute */
+    args[n ++] = CLASS_NAME;
+
+    args[n ++] = NULL;          /* terminate argument list */
+
+    _execvp(JAVA_NAME, args);   /* execute java interpreter */
+
+    /* if exec call returns, there was an error */
+    server_error("interpreter execution failure");
+    return 1;
+}
+
+/*
+ * Return primitive error message to server because of some failure in
+ * this program.  (This could be embellished to an HTML formatted error
+ * message.)
+ */
+static void
+server_error(
+    char  *message
+)
+{
+    /*
+     * NOTE: CGI 1.0 spec uses "\n" (unlike "\r\n"
+     * for HTTP 1.0) for line termination
+     */
+    printf("Status: 500 Server Error: %s\n", message);
+    printf("Content-type: text/plain\n");
+    printf("\n");
+    printf("%s", message);
+}