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uwsgi.go
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uwsgi.go
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package uwsgi
/*
this is a very low-level module, full of performance hacks
do not take it as a good example of go coding...
*/
import (
"strings"
"net/http"
"net/http/cgi"
"io"
)
//extern uwsgi_takeover
func uwsgi_takeover()
//extern uwsgi_response_write_body_do
func uwsgi_response_write_body_do(*interface{}, *byte, uint64) int
//extern uwsgi_response_prepare_headers_int
func uwsgi_response_prepare_headers_int(*interface{}, int) int
//extern uwsgi_response_add_header
func uwsgi_response_add_header(*interface{}, *byte, uint16, *byte, uint16) int
//extern uwsgi_gccgo_helper_request_body_read
func uwsgi_request_body_read(*interface{}, *byte, uint64) int
//extern uwsgi_gccgo_helper_register_signal
func uwsgi_register_signal(uint8, *byte, func(uint8)) int
//extern uwsgi_cache_magic_get
func uwsgi_cache_magic_get(*byte, uint16, *uint64, *uint64, *byte) *byte;
//extern __go_byte_array_to_string
func __go_byte_array_to_string(*byte, int) string
//extern free
func free(* byte)
var uwsgi_signals_gc [256]func(uint8)
var uwsgi_env_gc map[interface{}]interface{}
func Env(wsgi_req *interface{}) *map[string]string {
var env map[string]string
env = make(map[string]string)
uwsgi_env_gc[wsgi_req] = &env
return &env
}
func EnvAdd(env *map[string]string, k *byte, kl uint16, v *byte, vl uint16) {
s_k := __go_byte_array_to_string(k, int(kl))
s_v := __go_byte_array_to_string(v, int(vl))
(*env)[ s_k ] = s_v
}
type ResponseWriter struct {
r *http.Request
wsgi_req *interface{}
headers http.Header
wroteHeader bool
}
func (w *ResponseWriter) Write(p []byte) (n int, err error) {
if !w.wroteHeader {
w.WriteHeader(http.StatusOK)
}
uwsgi_response_write_body_do(w.wsgi_req, &p[0], uint64(len(p)))
return len(p), err
}
func (w *ResponseWriter) WriteHeader(status int) {
uwsgi_response_prepare_headers_int(w.wsgi_req, status )
if w.headers.Get("Content-Type") == "" {
w.headers.Set("Content-Type", "text/html; charset=utf-8")
}
for k := range w.headers {
for _, v := range w.headers[k] {
v = strings.NewReplacer("\n", " ", "\r", " ").Replace(v)
v = strings.TrimSpace(v)
kb := []byte(k)
vb := []byte(v)
uwsgi_response_add_header(w.wsgi_req, &kb[0], uint16(len(k)), &vb[0], uint16(len(v)))
}
}
w.wroteHeader = true
}
func (w *ResponseWriter) Header() http.Header {
return w.headers
}
type BodyReader struct {
wsgi_req *interface{}
}
// there is no close in request body
func (br *BodyReader) Close() error {
return nil
}
func (br *BodyReader) Read(p []byte) (n int, err error) {
var rlen int = uwsgi_request_body_read(br.wsgi_req, &p[0], uint64(len(p)))
if (rlen == 0) {
err = io.EOF;
return 0, err
} else if (rlen == -1) {
err = io.ErrUnexpectedEOF
return 0, err
}
return rlen, err
}
func RequestHandler(env *map[string]string, wsgi_req *interface{}) {
httpReq, err := cgi.RequestFromMap(*env)
if err == nil {
httpReq.Body = &BodyReader{wsgi_req}
w := ResponseWriter{httpReq, wsgi_req,http.Header{},false}
http.DefaultServeMux.ServeHTTP(&w, httpReq)
}
delete(uwsgi_env_gc, wsgi_req)
}
func RegisterSignal(signum uint8, receiver string, handler func(uint8)) bool {
if (receiver == "") {
receiver = "worker"
}
var b []byte = []byte(receiver)
if (uwsgi_register_signal(signum, &b[0], handler) < 0) {
return false
}
uwsgi_signals_gc[signum] = handler
return true
}
// get an item from the cache
func CacheGet(key string, cache string) string {
var b_key []byte = []byte(key)
var v_len uint64 = 0
var expires uint64 = 0
var value *byte
if (cache == "") {
value = uwsgi_cache_magic_get(&b_key[0], uint16(len(b_key)), &v_len, &expires, nil)
} else {
b_cache := []byte(cache)
value = uwsgi_cache_magic_get(&b_key[0], uint16(len(b_key)), &v_len, &expires, &b_cache[0])
}
ret := __go_byte_array_to_string(value, int(v_len))
free(value)
return ret
}
func SignalHandler(handler func(uint8), signum uint8) {
handler(signum)
}
func Run() {
uwsgi_env_gc = make(map[interface{}]interface{})
uwsgi_takeover()
}