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main.go
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main.go
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// Copyright (c) 2023, Jinhua Luo (kingluo) [email protected]
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package main
/*
#cgo LDFLAGS: -shared
#include <string.h>
void* ngx_http_lua_ffi_task_poll(void *p);
char* ngx_http_lua_ffi_get_req(void *tsk, int *len);
void ngx_http_lua_ffi_respond(void *tsk, int rc, char* rsp, int rsp_len);
*/
import "C"
import (
"crypto/x509"
"io"
"log"
"net/http"
"os"
"strconv"
"sync"
"sync/atomic"
"unsafe"
//_ "net/http/pprof"
"github.com/cristalhq/base64"
"github.com/imroc/req/v3"
jsoniter "github.com/json-iterator/go"
)
var json = jsoniter.ConfigCompatibleWithStandardLibrary
const (
NEW_CLIENT uint = iota
CLOSE_CLIENT
REQUEST
WRITE_REQ_BODY
READ_RSP_BODY
READ_TRAILER
CLOSE_REQUEST
)
const (
HTTP_GET uint = iota
HTTP_POST
HTTP_PUT
HTTP_DELETE
HTTP_OPTIONS
HTTP_HEAD
HTTP_PATCH
)
type Request struct {
Method *int `json:"method"`
URL string `json:"url"`
Args *map[string]interface{} `json:"args"`
Headers *map[string]string `json:"headers"`
Body *string `json:"body"`
BodyWriter bool `json:"body_writer"`
BodyReader bool `json:"body_reader"`
Form *map[string]interface{} `json:"form"`
Files *map[string]string `json:"files"`
}
type ClientConfig struct {
Version *uint `json:"version"`
Workers *uint `json:"workers"`
MaxConnsPerHost *int `json:"max_conns_per_host"`
MaxIdleConns *int `json:"max_idle_conns"`
DisableCompression *bool `json:"disable_compression"`
DisableHTTP3 *bool `json:"disable_http3"`
DisableH2C *bool `json:"disable_h2c"`
SSLVerify []string `json:"ssl_verify"`
SSLServerName *string `json:"ssl_server_name"`
}
type Command struct {
task unsafe.Pointer `json:"-"`
Cmd uint `json:"cmd"`
Client *uint64 `json:"client"`
ReqId *uint64 `json:"req_id"`
ClientConfig *ClientConfig `json:"client_config"`
Req *Request `json:"req"`
}
type Response struct {
StatusCode int `json:"status"`
ProtoMajor int `json:"proto_major"`
ProtoMinor int `json:"proto_minor"`
Headers http.Header `json:"headers"`
Body *string `json:"body,omitempty"`
ReqId *uint64 `json:"req_id,omitempty"`
Trailer http.Header `json:"trailer,omitempty"`
TLSVersion *uint16 `json:"tls_version,omitempty"`
}
type BodyCtx struct {
id uint64
reqWriter *io.PipeWriter
cmd *Command
rsp *req.Response
rspCh chan *Command
}
func (ctx *BodyCtx) Close() {
if ctx.reqWriter != nil {
ctx.reqWriter.Close()
}
if ctx.rspCh != nil {
close(ctx.rspCh)
}
}
type Client struct {
*req.Client
reqCh chan *Command
req_id atomic.Uint64
reqs sync.Map
}
func sendReq(r *req.Request, cmd *Command, client *Client, ctx *BodyCtx) {
var resp *req.Response
var err error
if cmd.Req.Method == nil {
resp, err = r.Get(cmd.Req.URL)
} else {
switch *cmd.Req.Method {
case 1:
resp, err = r.Post(cmd.Req.URL)
default:
resp, err = r.Get(cmd.Req.URL)
}
}
var rc C.int
var data interface{}
if err != nil {
log.Printf("%+v\n", err)
rc = 1
data = err
} else {
rsp := &Response{
StatusCode: resp.StatusCode,
ProtoMajor: resp.ProtoMajor,
ProtoMinor: resp.ProtoMinor,
Headers: resp.Header,
Trailer: resp.Trailer,
}
if resp.TLS != nil {
rsp.TLSVersion = &resp.TLS.Version
}
data = rsp
if cmd.Req.BodyReader {
if ctx != nil {
ctx.reqWriter = nil
rsp.ReqId = &ctx.id
} else {
id := client.req_id.Add(1)
ctx = &BodyCtx{id: id, rsp: resp}
client.reqs.Store(id, ctx)
rsp.ReqId = &id
}
ch := make(chan *Command, 100)
ctx.rspCh = ch
go func() {
b := make([]byte, 0, 512)
defer func() {
//FIXME, data race
ctx.rspCh = nil
close(ch)
resp.Body.Close()
}()
read_body_loop:
for cmd := range ch {
for {
if len(b) == cap(b) {
// Add more capacity (let append pick how much).
b = append(b, 0)[:len(b)]
}
sz := cap(b) - len(b)
n, err := resp.Body.Read(b[len(b):cap(b)])
b = b[:len(b)+n]
if err != nil {
if err != io.EOF {
log.Printf("%+v\n", err)
}
reply(0, b, cmd)
break read_body_loop
}
if n < sz {
break
}
}
reply(0, b, cmd)
b = b[:0]
}
}()
} else {
body, err := resp.ToBytes()
if err != nil {
log.Fatal(err)
}
str := base64.StdEncoding.EncodeToString(body)
rsp.Body = &str
}
}
rsp, err := json.Marshal(data)
if err != nil {
log.Fatalln(err)
}
reply(rc, rsp, cmd)
}
func reply(rc C.int, rsp []byte, cmd *Command) {
if rsp != nil && len(rsp) > 0 {
C.ngx_http_lua_ffi_respond(cmd.task, rc, (*C.char)(C.CBytes(rsp)), C.int(len(rsp)))
} else {
C.ngx_http_lua_ffi_respond(cmd.task, rc, nil, 0)
}
}
func handle_request(client *Client, cmd *Command) {
r := client.R()
if cmd.Req.Args != nil {
r.SetQueryParamsAnyType(*cmd.Req.Args)
}
if cmd.Req.BodyReader {
r.DisableAutoReadResponse()
}
if !cmd.Req.BodyWriter {
if cmd.Req.Body != nil {
r.SetBody(*cmd.Req.Body)
} else {
if cmd.Req.Form != nil {
r.SetFormDataAnyType(*cmd.Req.Form)
}
if cmd.Req.Files != nil {
r.SetFiles(*cmd.Req.Files)
}
}
sendReq(r, cmd, client, nil)
} else {
var bodyCtx *BodyCtx
reqR, reqW := io.Pipe()
r.SetBody(reqR)
id := client.req_id.Add(1)
bodyCtx = &BodyCtx{id: id, reqWriter: reqW, cmd: cmd}
client.reqs.Store(id, bodyCtx)
data := strconv.FormatUint(id, 10)
reply(0, []byte(data), cmd)
cmd.task = nil
sendReq(r, cmd, client, bodyCtx)
}
}
func request(client *Client) {
for cmd := range client.reqCh {
handle_request(client, cmd)
}
}
//export libffi_init
func libffi_init(_ *C.char, tq unsafe.Pointer) C.int {
//go http.ListenAndServe("localhost:6060", nil)
go func() {
var client_idx uint64
clients := make(map[uint64]*Client)
for {
task := C.ngx_http_lua_ffi_task_poll(tq)
if task == nil {
log.Println("exit lua-resty-ffi-req runtime")
break
}
var rlen C.int
r := C.ngx_http_lua_ffi_get_req(task, &rlen)
data := C.GoBytes(unsafe.Pointer(r), rlen)
var cmd Command
err := json.Unmarshal(data, &cmd)
if err != nil {
log.Fatalln("error:", err)
}
cmd.task = task
//log.Printf("%+v\n", cmd)
switch cmd.Cmd {
case NEW_CLIENT:
client_idx += 1
cli := req.C().EnableHTTP3().EnableInsecureSkipVerify()
var nWorkers uint = 10
if cmd.ClientConfig != nil {
cfg := cmd.ClientConfig
if cfg.Version != nil {
switch *cfg.Version {
case 1:
cli.EnableForceHTTP1()
case 2:
cli.EnableForceHTTP2()
case 3:
cli.EnableForceHTTP3()
}
}
if cfg.SSLVerify != nil {
//cli.DisableInsecureSkipVerify()
certPool, err := x509.SystemCertPool()
if err != nil {
log.Fatal(err)
}
for _, f := range cfg.SSLVerify {
caCertRaw, err := os.ReadFile(f)
if err != nil {
panic(err)
}
if ok := certPool.AppendCertsFromPEM(caCertRaw); !ok {
panic("Could not add root ceritificate to pool.")
}
}
cfg := cli.GetTLSClientConfig()
cfg.RootCAs = certPool
}
if cfg.SSLServerName != nil {
tlsCfg := cli.GetTLSClientConfig()
tlsCfg.ServerName = *cfg.SSLServerName
}
if cfg.Workers != nil {
nWorkers = *cfg.Workers
}
if cfg.MaxIdleConns != nil {
cli.GetTransport().SetMaxIdleConns(*cfg.MaxIdleConns)
}
if cfg.MaxConnsPerHost != nil {
cli.GetTransport().SetMaxConnsPerHost(*cfg.MaxConnsPerHost)
}
if cfg.DisableCompression != nil && *cfg.DisableCompression {
cli.DisableCompression()
}
if cfg.DisableHTTP3 != nil && *cfg.DisableHTTP3 {
cli.DisableHTTP3()
}
if cfg.DisableH2C != nil && *cfg.DisableH2C {
cli.DisableH2C()
}
}
ch := make(chan *Command, 1000)
client := &Client{Client: cli, reqCh: ch}
var i uint
for i = 0; i < nWorkers; i++ {
go request(client)
}
clients[client_idx] = client
rsp := strconv.FormatUint(client_idx, 10)
C.ngx_http_lua_ffi_respond(task, 0, (*C.char)(C.CString(rsp)), C.int(len(rsp)))
case CLOSE_CLIENT:
idx := *cmd.Client
client := clients[idx]
close(clients[idx].reqCh)
delete(clients, idx)
client.reqs.Range(func(key, value interface{}) bool {
ctx := value.(*BodyCtx)
ctx.Close()
return true
})
C.ngx_http_lua_ffi_respond(task, 0, nil, 0)
case REQUEST:
idx := *cmd.Client
client := clients[idx]
if len(client.reqCh) > 100 {
log.Println("all request workers busy, send request directly")
go handle_request(client, &cmd)
} else {
client.reqCh <- &cmd
}
case WRITE_REQ_BODY:
idx1 := *cmd.Client
idx2 := *cmd.ReqId
go func() {
client := clients[idx1]
item, _ := client.reqs.Load(idx2)
ctx := item.(*BodyCtx)
if cmd.Req != nil && cmd.Req.Body != nil {
ctx.reqWriter.Write([]byte(*cmd.Req.Body))
C.ngx_http_lua_ffi_respond(task, 0, nil, 0)
} else {
ctx.cmd.task = task
ctx.reqWriter.Close()
}
}()
case READ_RSP_BODY:
idx1 := *cmd.Client
idx2 := *cmd.ReqId
client := clients[idx1]
item, _ := client.reqs.Load(idx2)
ctx := item.(*BodyCtx)
select {
case ctx.rspCh <- &cmd:
default:
C.ngx_http_lua_ffi_respond(task, 0, nil, 0)
}
case READ_TRAILER:
idx1 := *cmd.Client
idx2 := *cmd.ReqId
client := clients[idx1]
item, _ := client.reqs.Load(idx2)
ctx := item.(*BodyCtx)
var rsp []byte
if ctx.rsp.Trailer != nil {
var err error
rsp, err = json.Marshal(ctx.rsp.Trailer)
if err != nil {
log.Fatalln(err)
}
}
reply(0, rsp, &cmd)
case CLOSE_REQUEST:
idx1 := *cmd.Client
idx2 := *cmd.ReqId
client := clients[idx1]
item, _ := client.reqs.Load(idx2)
ctx := item.(*BodyCtx)
ctx.Close()
client.reqs.Delete(idx2)
C.ngx_http_lua_ffi_respond(task, 0, nil, 0)
}
}
}()
return 0
}
func main() {}