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ngx_http_python_module.c
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ngx_http_python_module.c
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/*
* Author: Jakub Dornak ([email protected])
*/
#include "ngx_http_python_module.h"
static ngx_conf_enum_t ngx_http_python_handlers[] = {
{ ngx_string("xmlrpc"), NGX_HTTP_PYTHON_HANDLER_XMLRPC },
{ ngx_string("soap"), NGX_HTTP_PYTHON_HANDLER_SOAP },
{ ngx_null_string, 0 }
};
static ngx_command_t ngx_http_python_commands[] = {
{ ngx_string("python_path"),
NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_MAIN_CONF_OFFSET,
offsetof(ngx_http_python_main_conf_t, path),
NULL },
{ ngx_string("python_handler"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_python_loc_conf_t, handler),
&ngx_http_python_handlers },
{ ngx_string("python_module"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_python_loc_conf_t, module),
NULL },
{ ngx_string("python_xmlrpc_dispatcher"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_python_loc_conf_t, xmlrpc_dispatcher),
NULL },
{ ngx_string("python_soap_dispatcher"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_python_loc_conf_t, soap_dispatcher),
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_python_module_ctx = {
NULL, /* preconfiguration */
ngx_http_python_init, /* postconfiguration */
ngx_http_python_create_main_conf, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_python_create_loc_conf, /* create location configuration */
ngx_http_python_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_python_module = {
NGX_MODULE_V1,
&ngx_http_python_module_ctx, /* module context */
ngx_http_python_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
ngx_http_python_init_worker, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
ngx_http_python_exit_worker, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_int_t
ngx_http_python_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_http_python_loc_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_python_module);
if (!conf->handler) {
return NGX_DECLINED;
}
if (conf->pModule == NULL) {
conf->pModule = PyImport_ImportModule((char *)conf->module.data);
if (conf->pModule == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to import module: %s", conf->module.data);
return NGX_ERROR;
}
}
switch (conf->handler) {
case NGX_HTTP_PYTHON_HANDLER_XMLRPC:
if (conf->pXmlrpcDispatcher == NULL) {
conf->pXmlrpcDispatcher = PyObject_GetAttrString(conf->pModule, (char *)conf->xmlrpc_dispatcher.data);
if (conf->pXmlrpcDispatcher == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to import xmlrpc dispatcher '%s' from module '%s'", conf->xmlrpc_dispatcher.data, conf->module.data);
return NGX_ERROR;
}
if (!PyObject_HasAttrString(conf->pXmlrpcDispatcher, "_marshaled_dispatch")) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Object '%s' is not a valid XmlRPC dispatcher", conf->xmlrpc_dispatcher.data);
Py_CLEAR(conf->pXmlrpcDispatcher);
return NGX_ERROR;
}
}
switch (r->method) {
case NGX_HTTP_HEAD:
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
r->headers_out.status = NGX_HTTP_OK;
return ngx_http_send_header(r);
case NGX_HTTP_POST:
r->request_body_in_single_buf = 1;
rc = ngx_http_read_client_request_body(r, ngx_http_python_xmlrpc_handler);
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
return NGX_DONE;
default:
return NGX_HTTP_NOT_ALLOWED;
}
default:
return NGX_DECLINED;
}
}
static void
ngx_http_python_xmlrpc_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_buf_t *buf;
ngx_chain_t out;
ngx_str_t content_type = ngx_string("text/xml");
u_char *req;
int req_size;
char *content;
size_t content_length, size;
PyObject *pResponse;
ngx_http_python_loc_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r, ngx_http_python_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "ngx_http_python_xmlrpc_handler");
buf = r->request_body->bufs->next ? r->request_body->bufs->next->buf : r->request_body->bufs->buf;
if (buf->in_file) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "file buffer");
req_size = buf->file_last - buf->file_pos;
req = ngx_palloc(r->pool, req_size + 1);
if (req == NULL) {
ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
size = ngx_read_file(buf->file, req, req_size, buf->file_pos);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "read %d bytes from file", size);
} else {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "memory buffer");
req_size = buf->last - buf->pos;
req = buf->pos;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "req_size = %d", req_size);
pResponse = PyObject_CallMethod(conf->pXmlrpcDispatcher, "_marshaled_dispatch", "(y#)", (char *)req, req_size);
if (pResponse == NULL) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "Failed to call dispatcher method");
ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST);
return;
}
content_length = PyBytes_GET_SIZE(pResponse);
content = PyBytes_AS_STRING(pResponse);
out.next = NULL;
out.buf = ngx_create_temp_buf(r->pool, content_length);
if (out.buf == NULL) {
Py_DECREF(pResponse);
ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
out.buf->last = ngx_cpymem(out.buf->last, content, content_length);
out.buf->last_buf = 1;
Py_DECREF(pResponse);
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_type = content_type;
r->headers_out.content_length_n = content_length;
rc = ngx_http_send_header(r);
if (rc == NGX_OK) {
rc = ngx_http_output_filter(r, &out);
}
ngx_http_finalize_request(r, rc);
}
static void *
ngx_http_python_create_main_conf(ngx_conf_t *cf)
{
return ngx_pcalloc(cf->pool, sizeof(ngx_http_python_main_conf_t));
}
static void *
ngx_http_python_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_python_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_python_loc_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->module = { 0, NULL };
* conf->xmlrpc_dispatcher = { 0, NULL };
* conf->soap_dispatcher = { 0, NULL };
* conf->pModule = NULL;
* conf->pXmlrpcDispatcher = NULL;
* conf->pSoapDispatcher = NULL;
*/
conf->handler = NGX_CONF_UNSET_UINT;
return (void *)conf;
}
static char *
ngx_http_python_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_python_loc_conf_t *prev = parent;
ngx_http_python_loc_conf_t *conf = child;
ngx_conf_merge_uint_value(conf->handler,
prev->handler, 0);
ngx_conf_merge_str_value(conf->module,
prev->module, "");
ngx_conf_merge_str_value(conf->xmlrpc_dispatcher,
prev->xmlrpc_dispatcher, "");
ngx_conf_merge_str_value(conf->soap_dispatcher,
prev->soap_dispatcher, "");
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_python_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_python_handler;
return NGX_OK;
}
static ngx_int_t
ngx_http_python_init_worker(ngx_cycle_t *cycle)
{
ngx_http_python_main_conf_t *conf;
ngx_str_t assign = ngx_string("import sys\nsys.path = ");
ngx_str_t code;
u_char *last;
conf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_python_module);
ngx_log_error(NGX_LOG_INFO, &(cycle->new_log), 0, "Initializing Python interpreter");
Py_Initialize();
if (conf->path.len) {
ngx_log_error(NGX_LOG_INFO, &(cycle->new_log), 0, "Setting up sys.path = %s", conf->path.data);
code.len = assign.len + conf->path.len;
code.data = ngx_alloc(code.len + 1, &(cycle->new_log));
last = code.data;
last = ngx_cpymem(last, assign.data, assign.len);
last = ngx_cpymem(last, conf->path.data, conf->path.len);
*last = '\0';
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, &(cycle->new_log), 0, "PyRun_SimpleString(\"%s\")", code.data);
PyRun_SimpleString((char *)code.data);
}
return NGX_OK;
}
void
ngx_http_python_exit_worker(ngx_cycle_t *cycle)
{
Py_Finalize();
}