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2980 lines (2458 loc) · 94.1 KB
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/*
* Copyright (C) 2000, 2001, 2013 Gregory Trubetskoy
* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*
* Originally developed by Gregory Trubetskoy.
*
*
* mod_python.c
*
*
* See accompanying documentation and source code comments
* for details.
*
*/
#include "mod_python.h"
static PyThreadState* global_tstate;
/* Server object for main server as supplied to python_init(). */
static server_rec *main_server = NULL;
/* List of available Python obCallBacks/Interpreters */
static apr_hash_t *interpreters = NULL;
static apr_pool_t *interp_pool = NULL;
static void release_interpreter(interpreterdata *idata);
apr_pool_t *child_init_pool = NULL;
/* Optional functions imported from mod_include when loaded: */
static APR_OPTIONAL_FN_TYPE(ap_register_include_handler) *optfn_register_include_handler;
static APR_OPTIONAL_FN_TYPE(ap_ssi_get_tag_and_value) *optfn_ssi_get_tag_and_value;
static APR_OPTIONAL_FN_TYPE(ap_ssi_parse_string) *optfn_ssi_parse_string;
/**
** make_obcallback
**
* This function instantiates an obCallBack object.
* NOTE: The obCallBack object is instantiated by Python
* code. This C module calls into Python code which returns
* the reference to obCallBack.
*/
static PyObject * make_obcallback(const char *name)
{
PyObject *m = NULL;
PyObject *obCallBack = NULL;
/* This makes _apache appear imported, and subsequent
* >>> import _apache
* will not give an error.
*/
_apache_module_init();
/* Now execute the equivalent of
* >>> import <module>
* >>> <initstring>
* in the __main__ module to start up Python.
*/
m = PyImport_ImportModule("mod_python.apache");
if (!m) {
PyObject *path;
char *c_path;
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"make_obcallback: could not import mod_python.apache.\n");
PyErr_Print();
fflush(stderr);
path = PyObject_Repr(PySys_GetObject("path"));
MP_ANYSTR_AS_STR(c_path, path, 0);
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"make_obcallback: Python path being used \"%s\".",
c_path);
Py_DECREF(path);
return NULL;
} else {
/* Make sure that C and Python code have the same version */
const char *mp_dynamic_version = "<unknown>";
PyObject *mp = PyImport_ImportModule("mod_python");
if (mp) {
PyObject *d = PyModule_GetDict(mp);
PyObject *o = PyDict_GetItemString(d, "mp_version");
PyObject *f = PyDict_GetItemString(d, "__file__");
MP_ANYSTR_AS_STR(mp_dynamic_version, o, 1);
if (!mp_dynamic_version) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"make_obcallback: fatal: mp_dynamic_version is NULL.");
Py_DECREF(o);
Py_DECREF(mp);
return NULL;
}
if (strcmp(mp_version_string, mp_dynamic_version) != 0) {
char *c_f;
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, main_server,
"WARNING: mod_python version mismatch, expected '%s', found '%s'.",
mp_version_string, mp_dynamic_version);
MP_ANYSTR_AS_STR(c_f, f, 1);
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, main_server,
"WARNING: mod_python modules location '%s'.", c_f);
Py_DECREF(f); /* MP_ANYSTR_AS_STR */
}
Py_DECREF(o); /* MP_ANYSTR_AS_STR */
Py_XDECREF(mp);
/* call init to get obCallBack */
if (! (obCallBack = PyObject_CallMethod(
m, "init", "sO", name, MpServer_FromServer(main_server)))) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"make_obcallback: could not call init().");
PyErr_Print();
fflush(stderr);
}
} else {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"make_obcallback: could not import mod_python");
}
}
Py_XDECREF(m);
return obCallBack;
}
/**
** save_interpreter
**
* Save the interpreter. The argument is a PyThreadState
* belonging to (i.e. tstate->interp) the interpreter we are
* saving. Creates a new interpreterdata and returns a pointer to
* it.
*/
static interpreterdata *save_interpreter(const char *name, PyThreadState *tstate)
{
interpreterdata *idata = NULL;
idata = (interpreterdata *)malloc(sizeof(interpreterdata));
if (!idata)
return NULL;
idata->tstates = apr_array_make(interp_pool, 128, sizeof(interpreterdata *));
idata->interp = tstate->interp;
idata->obcallback = NULL;
apr_hash_set(interpreters, name, APR_HASH_KEY_STRING, idata);
return idata;
}
/*
* python_interpreter_name
*
* Get name of current interpreter. Must be called while lock is held.
* This is effectively a shortcut for accessing "apache.interpreter".
*/
PyObject *python_interpreter_name()
{
PyObject *m = NULL;
PyObject *d = NULL;
PyObject *o = NULL;
m = PyImport_ImportModule("mod_python.apache");
if (m) {
d = PyModule_GetDict(m);
o = PyDict_GetItemString(d, "interpreter");
if (o) {
Py_INCREF(o);
Py_DECREF(m);
return o;
}
}
return 0;
}
/**
** get_interpreter
**
* Get interpreter given its name.
*
* A thread state never outlives a handler; when a phase of a handler
* is done, there is no use for this thread state. But there is no
* need to malloc() a new thread state at every request, so when a
* handler is done, in release_interpreter() we push the tstate into
* an array of available tstates for this interpreter. When we need
* another tstate, we pop from this array, and only if that returns
* nothing do we create a new tstate.
*
*/
static interpreterdata *get_interpreter(const char *name)
{
PyThreadState *tstate;
interpreterdata *idata = NULL;
if (! name)
name = MAIN_INTERPRETER;
/* Py_NewInterpreter requires the GIL held, this is one way to have it so */
PyEval_RestoreThread(global_tstate);
idata = apr_hash_get(interpreters, name, APR_HASH_KEY_STRING);
if (!idata) {
tstate = Py_NewInterpreter();
if (!tstate) {
/* couldn't create an interpreter, this is bad */
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"get_interpreter: Py_NewInterpreter() returned NULL. No more memory?");
return NULL;
}
idata = save_interpreter(name, tstate);
if (!idata) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"get_interpreter: save_interpreter() returned NULL. No more memory?");
return NULL;
}
}
else {
#ifdef WITH_THREAD
/* use an available tstate, or create a new one */
PyThreadState ** tstate_pp;
tstate_pp = (PyThreadState **)apr_array_pop(idata->tstates);
if (!tstate_pp)
tstate = PyThreadState_New(idata->interp);
else
tstate = *tstate_pp;
#else
/* always use the first (and only) tstate */
tstate = idata->interp->tstate_head;
#endif
PyThreadState_Swap(tstate);
}
/* At this point GIL is held and tstate is set, we're ready to run */
if (!idata->obcallback) {
idata->obcallback = make_obcallback(name);
if (!idata->obcallback) {
release_interpreter(idata);
ap_log_error(APLOG_MARK, APLOG_ERR, 0, main_server,
"get_interpreter: no interpreter callback found.");
return NULL;
}
}
return idata;
}
/**
** release_interpreter
**
* Release interpreter.
*/
static void release_interpreter(interpreterdata *idata)
{
PyThreadState *tstate = PyThreadState_Get();
#ifdef WITH_THREAD
PyThreadState_Clear(tstate);
if (idata)
APR_ARRAY_PUSH(idata->tstates, PyThreadState *) = tstate;
else
PyThreadState_Delete(tstate);
PyEval_ReleaseThread(tstate);
#else
if (!idata) PyThreadState_Delete(tstate);
#endif
}
/**
** pytho_cleanup
**
* This function gets called for clean ups registered
* with register_cleanup(). Clean ups registered via
* PythonCleanupHandler run in python_cleanup_handler()
* below.
*/
apr_status_t python_cleanup(void *data)
{
interpreterdata *idata;
cleanup_info *ci = (cleanup_info *)data;
/* get/create interpreter */
idata = get_interpreter(ci->interpreter);
if (!idata) {
Py_DECREF(ci->handler);
Py_XDECREF(ci->data);
free((void *)ci->interpreter);
free(ci);
return APR_SUCCESS; /* this is ignored anyway */
}
/*
* Call the cleanup function.
*/
if (! PyObject_CallFunction(ci->handler, "O", ci->data)) {
PyObject *ptype;
PyObject *pvalue;
PyObject *ptb;
PyObject *handler;
PyObject *stype;
PyObject *svalue;
char *c_handler, *c_svalue, *c_stype;
PyErr_Fetch(&ptype, &pvalue, &ptb);
handler = PyObject_Str(ci->handler);
stype = PyObject_Str(ptype);
svalue = PyObject_Str(pvalue);
Py_XDECREF(ptype);
Py_XDECREF(pvalue);
Py_XDECREF(ptb);
MP_ANYSTR_AS_STR(c_handler, handler, 0);
if (!c_handler) c_handler = "<ERROR>";
MP_ANYSTR_AS_STR(c_svalue, svalue, 0);
if (!c_svalue) c_svalue = "<ERROR>";
MP_ANYSTR_AS_STR(c_stype, stype, 0);
if (!c_stype) c_stype = "<ERROR>";
if (ci->request_rec) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0,
ci->request_rec,
"python_cleanup: Error calling cleanup object %s",
c_handler);
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0,
ci->request_rec,
" %s: %s", c_stype, c_svalue);
}
else {
ap_log_error(APLOG_MARK, APLOG_ERR, 0,
ci->server_rec,
"python_cleanup: Error calling cleanup object %s",
c_handler);
ap_log_error(APLOG_MARK, APLOG_ERR, 0,
ci->server_rec,
" %s: %s", c_stype, c_svalue);
}
Py_DECREF(handler);
Py_DECREF(stype);
Py_DECREF(svalue);
}
Py_DECREF(ci->handler);
Py_DECREF(ci->data);
free((void *)ci->interpreter);
free(ci);
release_interpreter(idata);
return APR_SUCCESS;
}
static apr_status_t init_mutexes(server_rec *s, apr_pool_t *p, py_global_config *glb)
{
int max_threads = 0;
int max_procs = 0;
int is_threaded = 0;
int is_forked = 0;
int max_clients;
int locks;
int n;
const char *val;
const char *mutex_dir;
py_config *conf;
conf = (py_config *) ap_get_module_config(s->module_config,
&python_module);
/* figure out maximum possible concurrent connections */
/* MAX_DAEMON_USED seems to account for MaxClients, as opposed to
MAX_DAEMONS, which is ServerLimit
*/
ap_mpm_query(AP_MPMQ_IS_THREADED, &is_threaded);
if (is_threaded != AP_MPMQ_NOT_SUPPORTED) {
ap_mpm_query(AP_MPMQ_MAX_THREADS, &max_threads);
}
ap_mpm_query(AP_MPMQ_IS_FORKED, &is_forked);
if (is_forked != AP_MPMQ_NOT_SUPPORTED) {
/* XXX This looks strange, and it is. prefork.c seems to use
MAX_DAEMON_USED the same way that worker.c uses
MAX_DAEMONS (prefork is wrong IMO) */
ap_mpm_query(AP_MPMQ_MAX_DAEMON_USED, &max_procs);
if (max_procs == -1) {
ap_mpm_query(AP_MPMQ_MAX_DAEMONS, &max_procs);
}
}
max_clients = (((max_threads <= 0) ? 1 : max_threads) *
((max_procs <= 0) ? 1 : max_procs));
/* On some systems the locking mechanism chosen uses valuable
system resources, notably on RH 8 it will use sysv ipc for
which Linux by default provides only 128 semaphores
system-wide, and on many other systems flock is used, which
results in a relatively large number of open files.
The maximum number of locks can be specified at
compile time using "./configure --with-max-locks value" or
at run time with "PythonOption mod_python.mutex_locks value".
If the PythonOption directive is used, it must be in a
server config context, otherwise it will be ignored.
The optimal number of necessary locks is not clear, perhaps a
small number is more than sufficient - if someone took the
time to run some research on this, that'd be most welcome!
*/
val = apr_table_get(conf->options, "mod_python.mutex_locks");
if (val) {
locks = atoi(val);
} else {
locks = MAX_LOCKS;
}
locks = (max_clients > locks) ? locks : max_clients;
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s,
"mod_python: Creating %d session mutexes based "
"on %d max processes and %d max threads.",
locks, max_procs, max_threads);
glb->g_locks = (apr_global_mutex_t **)
apr_palloc(p, locks * sizeof(apr_global_mutex_t *));
glb->nlocks = locks;
glb->parent_pid = getpid();
#if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
/* On some sytems a directory for the mutex lock files is required.
This mutex directory can be specifed at compile time using
"./configure --with-mutex-dir value" or at run time with
"PythonOption mod_python.mutex_directory value".
If the PythonOption directive is used, it must be in a
server config context, otherwise it will be ignored.
XXX Should we check if mutex_dir exists and has the correct
permissions?
*/
mutex_dir = apr_table_get(conf->options, "mod_python.mutex_directory");
if (!mutex_dir)
mutex_dir = MUTEX_DIR;
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s,
"mod_python: using mutex_directory %s ",
mutex_dir);
#endif
for (n=0; n<locks; n++) {
apr_status_t rc;
apr_global_mutex_t **mutex = glb->g_locks;
#if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
char fname[255];
/* XXX What happens if len(mutex_dir) > 255 - len(mpmtx%d%d)? */
snprintf(fname, 255, "%s/mpmtx%d%d", mutex_dir, glb->parent_pid, n);
#else
char *fname = NULL;
#endif
rc = apr_global_mutex_create(&mutex[n], fname, APR_LOCK_DEFAULT,
p);
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rc, s,
"mod_python: Failed to create global mutex %d of %d (%s).",
n, locks, (!fname) ? "<null>" : fname);
if (n > 1) {
/* we were able to create at least two, so lets just print a
warning/hint and proceed
*/
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"mod_python: We can probably continue, but with diminished ability "
"to process session locks.");
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"mod_python: Hint: On Linux, the problem may be the number of "
"available semaphores, check 'sysctl kernel.sem'");
/* now free two locks so that if there is another
module or two that wants a lock, it will be ok */
apr_global_mutex_destroy(mutex[n-1]);
glb->nlocks = n-1;
if (n > 2) {
apr_global_mutex_destroy(mutex[n-2]);
glb->nlocks = n-2;
}
break;
}
else {
return rc;
}
}
else {
#if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
#if AP_MODULE_MAGIC_AT_LEAST(20081201,0)
ap_unixd_set_global_mutex_perms(mutex[n]);
#else
if (!geteuid()) {
chown(fname, unixd_config.user_id, -1);
unixd_set_global_mutex_perms(mutex[n]);
}
#endif
#endif
}
}
return APR_SUCCESS;
}
static apr_status_t reinit_mutexes(server_rec *s, apr_pool_t *p, py_global_config *glb)
{
int n;
#if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
/* Determine the directory to use for mutex lock files.
See init_mutexes function for more details.
*/
const char *mutex_dir;
py_config *conf;
conf = (py_config *) ap_get_module_config(s->module_config,
&python_module);
mutex_dir = apr_table_get(conf->options, "mod_python.mutex_directory");
if (!mutex_dir)
mutex_dir = MUTEX_DIR;
#endif
for (n=0; n< glb->nlocks; n++) {
apr_status_t rc;
apr_global_mutex_t **mutex = glb->g_locks;
#if !defined(OS2) && !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
char fname[255];
snprintf(fname, 255, "%s/mpmtx%d%d", mutex_dir, glb->parent_pid, n);
#else
char *fname = NULL;
#endif
rc = apr_global_mutex_child_init(&mutex[n], fname, p);
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, s,
"mod_python: Failed to reinit global mutex %s.",
(!fname) ? "<null>" : fname);
return rc;
}
}
return APR_SUCCESS;
}
/**
** python_create_global_config
**
* This creates the part of config that survives
* server restarts
*
*/
static py_global_config *python_create_global_config(server_rec *s)
{
apr_pool_t *pool = s->process->pool;
py_global_config *glb;
/* do we already have it in s->process->pool? */
apr_pool_userdata_get((void **)&glb, MP_CONFIG_KEY, pool);
if (glb) {
return glb;
}
/* otherwise, create it */
glb = (py_global_config *)apr_palloc(pool, sizeof(*glb));
apr_pool_userdata_set(glb, MP_CONFIG_KEY,
apr_pool_cleanup_null,
pool);
return glb;
}
/*
* mp_acquire_interpreter()
*
* Exported function for acquiring named interpreter.
*/
PyInterpreterState *mp_acquire_interpreter(const char *name)
{
interpreterdata *idata;
idata = get_interpreter(name);
return idata->interp;
}
/*
* mp_release_interpreter()
*
* Exported function for releasing acquired interpreter.
*
*/
void mp_release_interpreter(void)
{
release_interpreter(NULL);
}
/*
* mp_get_request_object(request_rec *req)
*
* Exported function for obtaining wrapper for request object.
*
*/
PyObject *mp_get_request_object(request_rec *req)
{
requestobject *request_obj;
request_obj = python_get_request_object(req, 0);
return (PyObject *)request_obj;
}
/*
* mp_get_server_object(server_rec *srv)
*
* Exported function for obtaining wrapper for server object.
*
*/
PyObject *mp_get_server_object(server_rec *srv)
{
return (PyObject *)MpServer_FromServer(srv);
}
/*
* mp_get_connection_object(conn_rec *conn)
*
* Exported function for obtaining wrapper for connection object.
*
*/
PyObject *mp_get_connection_object(conn_rec *conn)
{
return (PyObject *)MpConn_FromConn(conn);
}
/**
** python_init()
**
* Called by Apache at mod_python initialization time.
*/
static int python_init(apr_pool_t *p, apr_pool_t *ptemp,
apr_pool_t *plog, server_rec *s)
{
char buff[255];
void *data;
py_global_config *glb;
const char *userdata_key = "python_init";
apr_status_t rc;
const char *py_compile_version = PY_VERSION;
const char *py_dynamic_version = 0;
/* The "initialized" flag is a fudge for Mac OS X. It
* addresses two issues. The first is that when an Apache
* "restart" is performed, Apache will unload the mod_python
* shared object, but not the Python framework. This means
* that when "python_init()" is called after the restart,
* the mod_python initialization will not run if only the
* initialized state of Python is checked, because Python
* is already initialized. The second problem is that for
* some older revisions of Mac OS X, even on the initial
* startup of Apache, the "Py_IsInitialized()" function
* would return true and mod_python wouldn't initialize
* itself correctly and would crash.
*/
static int initialized = 0;
#ifdef WIN32
/* No need to run python_init() in Win32 parent processes as
* the lack of fork on Win32 means we get no benefit as far as
* inheriting a preinitialized Python interpreter. Further,
* upon a restart on Win32 platform the python_init() function
* will be called again in the parent process but without some
* resources allocated by the previous call having being
* released properly, resulting in memory and Win32 resource
* leaks.
*/
if (!getenv("AP_PARENT_PID"))
return OK;
#endif /* WIN32 */
apr_pool_userdata_get(&data, userdata_key, s->process->pool);
if (!data) {
apr_pool_userdata_set((const void *)1, userdata_key,
apr_pool_cleanup_null, s->process->pool);
return OK;
}
/* mod_python version */
ap_add_version_component(p, mp_version_component);
py_dynamic_version = strtok((char *)Py_GetVersion(), " ");
if (strcmp(py_compile_version, py_dynamic_version) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"python_init: Python version mismatch, expected '%s', found '%s'.",
py_compile_version, py_dynamic_version);
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"python_init: Python executable found '%s'.",
Py_GetProgramFullPath());
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"python_init: Python path being used '%s'.",
Py_GetPath());
}
/* Python version */
sprintf(buff, "Python/%.200s", py_dynamic_version);
ap_add_version_component(p, buff);
/* cache main server */
main_server = s;
/* global config */
glb = python_create_global_config(s);
if ((rc = init_mutexes(s, p, glb)) != APR_SUCCESS) {
return rc;
}
/* initialize global Python interpreter if necessary */
if (initialized == 0 || !Py_IsInitialized())
{
initialized = 1;
/* disable user site directories */
Py_NoUserSiteDirectory = 1;
/* Initialze the main interpreter. We do not want site.py to
* be imported because as of Python 2.7.9 it would cause a
* circular dependency related to _locale which breaks
* graceful restart so we set Py_NoSiteFlag to 1 just for this
* one time. (https://github.com/grisha/mod_python/issues/46)
*/
Py_NoSiteFlag = 1;
Py_Initialize();
Py_NoSiteFlag = 0;
#ifdef WITH_THREAD
/* create and acquire the interpreter lock */
PyEval_InitThreads();
#endif
/* create the obCallBack dictionary */
interpreters = apr_hash_make(p);
interp_pool = p;
if (! interpreters) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"python_init: apr_hash_make() failed! No more memory?");
exit(1);
}
/* save the global_tstate */
global_tstate = PyEval_SaveThread();
}
APR_REGISTER_OPTIONAL_FN(mp_acquire_interpreter);
APR_REGISTER_OPTIONAL_FN(mp_release_interpreter);
APR_REGISTER_OPTIONAL_FN(mp_get_request_object);
APR_REGISTER_OPTIONAL_FN(mp_get_server_object);
APR_REGISTER_OPTIONAL_FN(mp_get_connection_object);
return OK;
}
/**
** python_create_config
**
* Called by create_dir_config and create_srv_config
*/
static py_config *python_create_config(apr_pool_t *p)
{
py_config *conf =
(py_config *) apr_pcalloc(p, sizeof(py_config));
conf->authoritative = 1;
conf->d_is_location = 0;
conf->options = apr_table_make(p, 4);
conf->directives = apr_table_make(p, 4);
conf->hlists = apr_hash_make(p);
conf->in_filters = apr_hash_make(p);
conf->out_filters = apr_hash_make(p);
return conf;
}
/**
** python_create_dir_config
**
* Allocate memory and initialize the strucure that will
* hold configuration parametes.
*
* This function is called on every hit it seems.
*/
static void *python_create_dir_config(apr_pool_t *p, char *dir)
{
py_config *conf = python_create_config(p);
conf->config_dir = dir;
return conf;
}
/**
** python_create_srv_config
**
* Allocate memory and initialize the strucure that will
* hold configuration parametes.
*/
static void *python_create_srv_config(apr_pool_t *p, server_rec *srv)
{
py_config *conf = python_create_config(p);
return conf;
}
/**
** modpython_table_overlap
**
* Replaces the apr_table_overlap() function using a specific pool
* for the resulting table.
*/
static apr_table_t *modpython_table_overlap(apr_pool_t *p,
apr_table_t *current_table,
apr_table_t *new_table)
{
apr_table_t *merge = apr_table_overlay(p, current_table, new_table);
apr_table_compress(merge, APR_OVERLAP_TABLES_SET);
return merge;
}
/**
** python_merge_dir_config
**
*/
static void *python_merge_config(apr_pool_t *p, void *current_conf,
void *new_conf)
{
py_config *merged_conf =
(py_config *) apr_pcalloc(p, sizeof(py_config));
py_config *cc = (py_config *) current_conf;
py_config *nc = (py_config *) new_conf;
apr_hash_index_t *hi;
char *key;
apr_ssize_t klen;
hl_entry *hle;
py_handler *fh;
/* we basically allow the local configuration to override global,
* by first copying current values and then new values on top
*/
/** create **/
merged_conf->hlists = apr_hash_make(p);
merged_conf->in_filters = apr_hash_make(p);
merged_conf->out_filters = apr_hash_make(p);
/** merge directives and options **/
merged_conf->directives = modpython_table_overlap(p, cc->directives,
nc->directives);
merged_conf->options = modpython_table_overlap(p, cc->options,
nc->options);
/** copy current **/
merged_conf->authoritative = cc->authoritative;
merged_conf->config_dir = apr_pstrdup(p, cc->config_dir);
merged_conf->d_is_location = cc->d_is_location;
for (hi = apr_hash_first(p, cc->hlists); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void **)&key, &klen, (void **)&hle);
apr_hash_set(merged_conf->hlists, key, klen, (void *)hle);
}
for (hi = apr_hash_first(p, cc->in_filters); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void **)&key, &klen, (void **)&fh);
apr_hash_set(merged_conf->in_filters, key, klen, (void *)fh);
}
for (hi = apr_hash_first(p, cc->out_filters); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void **)&key, &klen, (void **)&fh);
apr_hash_set(merged_conf->out_filters, key, klen, (void *)fh);
}
/** copy new **/
if (nc->authoritative != merged_conf->authoritative)
merged_conf->authoritative = nc->authoritative;
if (nc->config_dir) {
merged_conf->config_dir = apr_pstrdup(p, nc->config_dir);
merged_conf->d_is_location = nc->d_is_location;
}
for (hi = apr_hash_first(p, nc->hlists); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void**)&key, &klen, (void **)&hle);
apr_hash_set(merged_conf->hlists, key, klen, (void *)hle);
}
for (hi = apr_hash_first(p, nc->in_filters); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void**)&key, &klen, (void **)&fh);
apr_hash_set(merged_conf->in_filters, key, klen, (void *)fh);
}
for (hi = apr_hash_first(p, nc->out_filters); hi; hi=apr_hash_next(hi)) {
apr_hash_this(hi, (const void**)&key, &klen, (void **)&fh);
apr_hash_set(merged_conf->out_filters, key, klen, (void *)fh);
}
return (void *) merged_conf;
}
/**
** python_directive
**
* Called by non-handler directives
*
*/
static const char *python_directive(cmd_parms *cmd, void * mconfig,
char *key, const char *val)
{
py_config *conf;
conf = (py_config *) mconfig;
apr_table_set(conf->directives, key, val);
return NULL;
}
/* returns a parent if it matches the given directive */
static const ap_directive_t * find_parent(const ap_directive_t *dirp,
const char *what)
{
while (dirp->parent != NULL) {
dirp = dirp->parent;
if (strcasecmp(dirp->directive, what) == 0)
return dirp;
}
return NULL;
}
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