72 |
73 |
--------------------------------------------------------------------------------
/Dockerfile:
--------------------------------------------------------------------------------
1 | FROM golang:alpine
2 |
3 | RUN apk add --no-cache git gcc musl-dev
4 |
5 | RUN CGO_ENABLED=1 go get --tags "linux sqlite_stat4 sqlite_allow_uri_authority sqlite_fts5 sqlite_introspect sqlite_json" github.com/alash3al/sqler
6 |
7 | ENTRYPOINT ["sqler"]
8 |
9 | WORKDIR /root/
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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/README.md:
--------------------------------------------------------------------------------
1 | SQLer
2 | =====
3 | > `SQL-er` is a tiny portable server enables you to write APIs using SQL query to be executed when anyone hits it, also it enables you to define validation rules so you can validate the request body/query params, as well as data transformation using simple `javascript` syntax. `sqler` uses `nginx` style configuration language ([`HCL`](https://github.com/hashicorp/hcl)) and `javascript` engine for custom expressions.
4 |
5 | Table Of Contents
6 | =================
7 | - [SQLer](#sqler)
8 | - [Table Of Contents](#table-of-contents)
9 | - [Features](#features)
10 | - [Quick Tour](#quick-tour)
11 | - [Supported DBMSs](#supported-dbmss)
12 | - [Docker](#docker)
13 | - [Configuration Overview](#configuration-overview)
14 | - [REST vs RESP](#rest-vs-resp)
15 | - [Sanitization](#sanitization)
16 | - [Validation](#validation)
17 | - [Authorization](#authorization)
18 | - [Data Transformation](#data-transformation)
19 | - [Aggregators](#aggregators)
20 | - [Issue/Suggestion/Contribution ?](#issuesuggestioncontribution)
21 | - [Author](#author)
22 | - [License](#license)
23 |
24 | Features
25 | ========
26 | - Standalone with no dependencies.
27 | - Works with most of SQL databases out there including (`SQL Server`, `MYSQL`, `SQLITE`, `PostgreSQL`, `Cockroachdb`)
28 | - Built-in RESTful server
29 | - Built-in RESP `Redis Protocol`, you connect to `SQLer` using any `redis` client
30 | - Built-in `Javascript` interpreter to easily transform the result
31 | - Built-in Validators
32 | - Automatically uses prepared statements
33 | - Uses ([`HCL`](https://github.com/hashicorp/hcl)) configuration language
34 | - You can load multiple configuration files not just one, based on `unix glob` style pattern
35 | - Each `SQL` query could be named as `Macro`
36 | - Uses `Javascript` custom expressions.
37 | - Each macro has its own `Context` (`query params` + `body params`) as `.Input` which is `map[string]interface{}`, and `.Utils` which is a list of helper functions, currently it contains only `SQLEscape`.
38 | - You can define `authorizers`, an `authorizer` is just a simple webhook that enables `sqler` to verify whether the request should be done or not.
39 | - Trigger a `webhook` or another `macro` when a specific `macro` get executed.
40 | - Schedule specific macros to run at specific time using simple `cron` syntax.
41 |
42 | Quick Tour
43 | ==========
44 | - You install `sqler` using the right binary for your `os` from the [releases](https://github.com/alash3al/sqler/releases) page.
45 | - Let's say that you downloaded `sqler_darwin_amd64`
46 | - Let's rename it to `sqler`, and copy it to `/usr/local/bin`
47 | - Now just run `sqler -h`, you will the next
48 | ```bash
49 | ____ ___ _
50 | / ___| / _ \| | ___ _ __
51 | \___ \| | | | | / _ \ '__|
52 | ___) | |_| | |__| __/ |
53 | |____/ \__\_\_____\___|_|
54 |
55 | turn your SQL queries into safe valid RESTful apis.
56 |
57 |
58 | -config string
59 | the config file(s) that contains your endpoints configs, it accepts comma seprated list of glob style pattern (default "./config.example.hcl")
60 | -driver string
61 | the sql driver to be used (default "mysql")
62 | -dsn string
63 | the data source name for the selected engine (default "root:root@tcp(127.0.0.1)/test?multiStatements=true")
64 | -resp string
65 | the resp (redis protocol) server listen address (default ":3678")
66 | -rest string
67 | the http restful api listen address (default ":8025")
68 | -workers int
69 | the maximum workers count (default 4)
70 | ```
71 | - you can specifiy multiple files for `-config` as [configuration](#configuration-overview), i.e `-config="/my/config/dir/*.hcl,/my/config/dir2/*.hcl"`
72 | - you need specify which driver you need and its `dsn` from the following:
73 |
74 | | Driver | DSN |
75 | ---------| ------ |
76 | | `mysql`| `usrname:password@tcp(server:port)/dbname?option1=value1&...`|
77 | | `postgres`| `postgresql://username:password@server:port/dbname?option1=value1`|
78 | | `sqlite3`| `/path/to/db.sqlite?option1=value1`|
79 | | `sqlserver` | `sqlserver://username:password@host/instance?param1=value¶m2=value` |
80 | | | `sqlserver://username:password@host:port?param1=value¶m2=value`|
81 | | | `sqlserver://sa@localhost/SQLExpress?database=master&connection+timeout=30`|
82 | | `mssql` | `server=localhost\\SQLExpress;user id=sa;database=master;app name=MyAppName`|
83 | | | `server=localhost;user id=sa;database=master;app name=MyAppName`|
84 | | | `odbc:server=localhost\\SQLExpress;user id=sa;database=master;app name=MyAppName` |
85 | | | `odbc:server=localhost;user id=sa;database=master;app name=MyAppName` |
86 | | `hdb` (SAP HANA) | `hdb://user:password@host:port` |
87 | | `clickhouse` (Yandex ClickHouse) | `tcp://host1:9000?username=user&password=qwerty&database=clicks&read_timeout=10&write_timeout=20&alt_hosts=host2:9000,host3:9000` |
88 |
89 | Supported DBMSs
90 | ===============
91 | - `MYSQL`, `TiDB`, `MariaDB`, `Percona` and any MYSQL compatible server uses `mysql` driver.
92 | - `PostgreSQL`, `CockroachDB` and any PostgreSQL compatible server uses `postgres` driver.
93 | - `SQL Server`, `MSSQL`, `ADO`, `ODBC` uses `sqlserver` or `mssql` driver.
94 | - `SQLITE`, uses `sqlite3` driver.
95 | - `HANA` (SAP), uses `hdb` driver.
96 | - `Clickhouse`, uses `clickhouse` driver.
97 |
98 | Docker
99 | ======
100 | > SQLer has a docker image called `alash3al/sqler` it is an automated build, you can use it like the following:
101 |
102 | ```bash
103 |
104 | # run the help message
105 | docker run --rm alash3al/sqler --help
106 |
107 | # connect to a local mysql
108 | docker run --network=host alash3al/sqler -driver=mysql -dsn=usr:pass@tcp(127.0.0.1:3306)/dbname
109 |
110 | # connect to another mysql container
111 | docker run -link mysql alash3al/sqler -driver=mysql -dsn=usr:pass@tcp(mysql:3306)/dbname
112 |
113 | ```
114 |
115 | Configuration Overview
116 | ======================
117 | ```hcl
118 | // create a macro/endpoint called "_boot",
119 | // this macro is private "used within other macros"
120 | // because it starts with "_".
121 | _boot {
122 | // the query we want to execute
123 | exec = < RESTful server could be used to interact directly with i.e `mobile, browser, ... etc`, in this mode `SQLer` is protected by `authorizers`, which gives you the ability to check authorization against another 3rd-party api.
201 | > Each macro you add to the configuration file(s) you can access to it by issuing a http request to `/`, every query param and json body will be passed to the macro `.Input`.
202 |
203 | > RESP server is just a basic `REDIS` compatible server, you connect to it using any `REDIS` client out there, even `redis-cli`, just open `redis-cli -p 3678 list` to list all available macros (`commands`), you can execute any macro as a redis command and pass the arguments as a json encoded data, i.e `redis-cli -p 3678 adduser "{\"user_name\": \"u6\", \"user_email\": \"email@tld.com\", \"user_password\":\"pass@123\"}"`.
204 |
205 | Sanitization
206 | =============
207 | > `SQLer` uses prepared statements, you can bind inputs like the following:
208 |
209 |
210 | ```hcl
211 | addpost {
212 | // $input is a global variable holds all request inputs,
213 | // including the http headers too (prefixed with `http_`)
214 | // all http header keys are normalized to be in this form
215 | // `http_x_header_example`, `http_authorization` ... etc in lower case.
216 | bind {
217 | title = "$input.post_title"
218 | content = "$input.post_content"
219 | user_id = "$input.post_user"
220 | }
221 |
222 | exec = < Data validation is very easy in `SQLer`, it is all about simple `javascript` expression like this:
233 |
234 | ```hcl
235 | addpost {
236 | // if any rule returns false,
237 | // SQLer will return 422 code, with invalid rules.
238 | //
239 | // $input is a global variable holds all request inputs,
240 | // including the http headers too (prefixed with `http_`)
241 | // all http header keys are normalized to be in this form
242 | // `http_x_header_example`, `http_authorization` ... etc in lower case.
243 | validators {
244 | post_title_length = "$input.post_title && $input.post_title.trim().length > 0"
245 | post_content_length = "$input.post_content && $input.post_content.length > 0"
246 | post_user = "$input.post_user"
247 | }
248 |
249 | bind {
250 | title = "$input.post_title"
251 | content = "$input.post_content"
252 | user_id = "$input.post_user"
253 | }
254 |
255 | exec = < If you want to expose `SQLer` as a direct api to API consumers, you will need to add an authorization layer on top of it, let's see how to do that
265 |
266 | ```hcl
267 | addpost {
268 | authorizer = < using that trick, you can use any third-party Authentication service that will remove that hassle from your code.
290 |
291 | Data Transformation
292 | ====================
293 | > In some cases we need to transform the resulted data into something more friendly to our API consumers, so I added `javascript` interpreter to `SQLer` so we can transform our data, each js code has a global variable called `$result`, it holds the result of the `exec` section, you should write your code like the following:
294 |
295 | ```hcl
296 | // list all databases, and run a transformer function
297 | databases {
298 | exec = "SHOW DATABASES"
299 |
300 | transformer = < `SQLer` helps you to merge multiple macros into one to minimize the API calls number, see the example bellow
319 |
320 | ```hcl
321 | databases {
322 | exec = "SHOW DATABASES"
323 |
324 | transformer = < I'm Mohamed Al Ashaal, just a problem solver :), you can view more projects from me [here](https://github.com/alash3al), and here is my email [m7medalash3al@gmail.com](mailto:m7medalash3al@gmail.com)
370 |
371 | License
372 | ========
373 | > Copyright 2019 The SQLer Authors. All rights reserved.
374 | > Use of this source code is governed by a Apache 2.0
375 | > license that can be found in the [LICENSE](/License) file.
376 |
377 |
--------------------------------------------------------------------------------
/config.example.hcl:
--------------------------------------------------------------------------------
1 | // create a macro/endpoint called "_boot",
2 | // this macro is private "used within other macros"
3 | // because it starts with "_".
4 | _boot {
5 | // the query we want to execute
6 | exec = < 0 {
30 | option = options[0]
31 | }
32 |
33 | if nil != option["method"] {
34 | method, _ = option["method"].(string)
35 | }
36 |
37 | if nil != option["headers"] {
38 | hdrs, _ := option["headers"].(map[string]interface{})
39 | headers = make(map[string]string)
40 | for k, v := range hdrs {
41 | headers[k], _ = v.(string)
42 | }
43 | }
44 |
45 | if nil != option["body"] {
46 | body, _ = option["body"]
47 | }
48 | client := resty.New()
49 | resp, err := client.R().SetHeaders(headers).SetBody(body).Execute(method, url)
50 | if err != nil {
51 | return nil, err
52 | }
53 |
54 | rspHdrs := resp.Header()
55 | rspHdrsNormalized := map[string]string{}
56 | for k, v := range rspHdrs {
57 | rspHdrsNormalized[strings.ToLower(k)] = v[0]
58 | }
59 |
60 | return map[string]interface{}{
61 | "status": resp.Status(),
62 | "statusCode": resp.StatusCode(),
63 | "headers": rspHdrsNormalized,
64 | "body": string(resp.Body()),
65 | }, nil
66 | }
67 |
--------------------------------------------------------------------------------
/macro.go:
--------------------------------------------------------------------------------
1 | package main
2 |
3 | import (
4 | "encoding/json"
5 | "fmt"
6 | "strings"
7 |
8 | "github.com/alash3al/go-color"
9 |
10 | "github.com/go-resty/resty/v2"
11 | "github.com/jmoiron/sqlx"
12 | )
13 |
14 | // Macro - a macro configuration
15 | type Macro struct {
16 | Methods []string
17 | Include []string
18 | Validators map[string]string
19 | Authorizer string
20 | Bind map[string]string
21 | Exec string
22 | Aggregate []string
23 | Transformer string
24 |
25 | Trigger struct {
26 | Webhook string
27 | Macro string
28 | }
29 |
30 | Cron string
31 |
32 | name string
33 | manager *Manager
34 | }
35 |
36 | // Call - executes the macro
37 | func (m *Macro) Call(input map[string]interface{}) (interface{}, error) {
38 | ok, err := m.authorize(input)
39 | if err != nil {
40 | return err.Error(), err
41 | }
42 |
43 | if !ok {
44 | return errAuthorizationError.Error(), errAuthorizationError
45 | }
46 |
47 | invalid, err := m.validate(input)
48 | if err != nil {
49 | return err.Error(), err
50 | } else if len(invalid) > 0 {
51 | return invalid, errValidationError
52 | }
53 |
54 | if err := m.runIncludes(input); err != nil {
55 | return err.Error(), err
56 | }
57 |
58 | var out interface{}
59 |
60 | if len(m.Aggregate) > 0 {
61 | out, err = m.aggregate(input)
62 | if err != nil {
63 | return err.Error(), err
64 | }
65 | } else {
66 | out, err = m.execSQLQuery(strings.Split(strings.TrimSpace(m.Exec), *flagSQLSeparator), input)
67 | if err != nil {
68 | return err.Error(), err
69 | }
70 | }
71 |
72 | out, err = m.transform(out)
73 | if err != nil {
74 | return err.Error(), err
75 | }
76 |
77 | go (func() {
78 | if m.Trigger.Webhook != "" {
79 | _, err := resty.New().R().SetDoNotParseResponse(true).SetHeader("Content-Type", "application/json").SetBody(map[string]interface{}{
80 | "payload": out,
81 | }).Post(m.Trigger.Webhook)
82 |
83 | if err != nil {
84 | color.Red("[X]- " + err.Error())
85 | }
86 | }
87 |
88 | if subm := m.manager.Get(m.Trigger.Macro); subm != nil {
89 | _, err := subm.Call(map[string]interface{}{
90 | "payload": out,
91 | })
92 |
93 | if err != nil {
94 | color.Red("[X]- " + err.Error())
95 | }
96 | }
97 | })()
98 |
99 | return out, nil
100 | }
101 |
102 | // execSQLQuery - execute the specified sql query
103 | func (m *Macro) execSQLQuery(sqls []string, input map[string]interface{}) (interface{}, error) {
104 | args, err := m.buildBind(input)
105 | if err != nil {
106 | return nil, err
107 | }
108 |
109 | conn, err := sqlx.Open(*flagDBDriver, *flagDBDSN)
110 | if err != nil {
111 | return nil, err
112 | }
113 | defer conn.Close()
114 |
115 | for i, sql := range sqls {
116 | if strings.TrimSpace(sql) == "" {
117 | sqls = append(sqls[0:i], sqls[i+1:]...)
118 | }
119 | }
120 |
121 | for _, sql := range sqls[0 : len(sqls)-1] {
122 | sql = strings.TrimSpace(sql)
123 | if "" == sql {
124 | continue
125 | }
126 | if _, err := conn.NamedExec(sql, args); err != nil {
127 | return nil, err
128 | }
129 | }
130 |
131 | rows, err := conn.NamedQuery(sqls[len(sqls)-1], args)
132 | if err != nil {
133 | return nil, err
134 | }
135 | defer rows.Close()
136 |
137 | ret := []map[string]interface{}{}
138 |
139 | for rows.Next() {
140 | row, err := m.scanSQLRow(rows)
141 | if err != nil {
142 | continue
143 | }
144 | ret = append(ret, row)
145 | }
146 |
147 | return interface{}(ret), nil
148 | }
149 |
150 | // scanSQLRow - scan a row from the specified rows
151 | func (m *Macro) scanSQLRow(rows *sqlx.Rows) (map[string]interface{}, error) {
152 | row := make(map[string]interface{})
153 | if err := rows.MapScan(row); err != nil {
154 | return nil, err
155 | }
156 |
157 | for k, v := range row {
158 | if nil == v {
159 | continue
160 | }
161 |
162 | switch v.(type) {
163 | case []uint8:
164 | v = []byte(v.([]uint8))
165 | default:
166 | v, _ = json.Marshal(v)
167 | }
168 |
169 | var d interface{}
170 | if nil == json.Unmarshal(v.([]byte), &d) {
171 | row[k] = d
172 | } else {
173 | row[k] = string(v.([]byte))
174 | }
175 | }
176 |
177 | return row, nil
178 | }
179 |
180 | // transform - run the transformer function
181 | func (m *Macro) transform(data interface{}) (interface{}, error) {
182 | transformer := strings.TrimSpace(m.Transformer)
183 | if transformer == "" {
184 | return data, nil
185 | }
186 |
187 | vm := initJSVM(map[string]interface{}{"$result": data})
188 |
189 | v, err := vm.RunString(transformer)
190 | if err != nil {
191 | return nil, err
192 | }
193 |
194 | return v.Export(), nil
195 | }
196 |
197 | // authorize - run the authorizer function
198 | func (m *Macro) authorize(input map[string]interface{}) (bool, error) {
199 | authorizer := strings.TrimSpace(m.Authorizer)
200 | if authorizer == "" {
201 | return true, nil
202 | }
203 |
204 | var execError error
205 |
206 | vm := initJSVM(map[string]interface{}{"$input": input})
207 |
208 | val, err := vm.RunString(m.Authorizer)
209 | if err != nil {
210 | return false, err
211 | }
212 |
213 | if execError != nil {
214 | return false, execError
215 | }
216 |
217 | return val.ToBoolean(), nil
218 | }
219 |
220 | // aggregate - run the aggregators
221 | func (m *Macro) aggregate(input map[string]interface{}) (map[string]interface{}, error) {
222 | ret := map[string]interface{}{}
223 | for _, k := range m.Aggregate {
224 | macro := m.manager.Get(k)
225 | if nil == macro {
226 | err := fmt.Errorf("unknown macro %s", k)
227 | return nil, err
228 | }
229 | out, err := macro.Call(input)
230 | if err != nil {
231 | return nil, err
232 | }
233 | ret[k] = out
234 | }
235 | return ret, nil
236 | }
237 |
238 | // validate - validate the input aginst the rules
239 | func (m *Macro) validate(input map[string]interface{}) (ret []string, err error) {
240 | if len(m.Validators) < 1 {
241 | return nil, nil
242 | }
243 |
244 | vm := initJSVM(map[string]interface{}{"$input": input})
245 |
246 | for k, src := range m.Validators {
247 | val, err := vm.RunString(src)
248 | if err != nil {
249 | return nil, err
250 | }
251 |
252 | if !val.ToBoolean() {
253 | ret = append(ret, k)
254 | }
255 | }
256 |
257 | return ret, err
258 | }
259 |
260 | // buildBind - build the bind vars
261 | func (m *Macro) buildBind(input map[string]interface{}) (map[string]interface{}, error) {
262 | if len(m.Bind) < 1 {
263 | return nil, nil
264 | }
265 |
266 | vm := initJSVM(map[string]interface{}{"$input": input})
267 | ret := map[string]interface{}{}
268 |
269 | for k, src := range m.Bind {
270 | val, err := vm.RunString(src)
271 | if err != nil {
272 | return nil, err
273 | }
274 |
275 | ret[k] = val.Export()
276 | }
277 |
278 | return ret, nil
279 | }
280 |
281 | // runIncludes - run the include function
282 | func (m *Macro) runIncludes(input map[string]interface{}) error {
283 | for _, name := range m.Include {
284 | macro := m.manager.Get(name)
285 | if nil == macro {
286 | return fmt.Errorf("macro %s not found", name)
287 | }
288 | _, err := macro.Call(input)
289 | if err != nil {
290 | return err
291 | }
292 | }
293 | return nil
294 | }
295 |
--------------------------------------------------------------------------------
/main.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "fmt"
8 | "strconv"
9 |
10 | "github.com/alash3al/go-color"
11 | )
12 |
13 | func main() {
14 | fmt.Println(color.MagentaString(sqlerBrand))
15 | fmt.Printf("⇨ sqler server version: %s \n", color.GreenString(sqlerVersion))
16 | fmt.Printf("⇨ sqler used driver is %s \n", color.GreenString(*flagDBDriver))
17 | fmt.Printf("⇨ sqler used dsn is %s \n", color.GreenString(*flagDBDSN))
18 | fmt.Printf("⇨ sqler workers count: %s \n", color.GreenString(strconv.Itoa(*flagWorkers)))
19 | fmt.Printf("⇨ sqler resp server available at: %s \n", color.GreenString(*flagRESPListenAddr))
20 | fmt.Printf("⇨ sqler rest server available at: %s \n", color.GreenString(*flagRESTListenAddr))
21 |
22 | err := make(chan error)
23 |
24 | go (func() {
25 | err <- initRESPServer()
26 | })()
27 |
28 | go (func() {
29 | err <- initRESTServer()
30 | })()
31 |
32 | if err := <-err; err != nil {
33 | color.Red(err.Error())
34 | }
35 | }
36 |
--------------------------------------------------------------------------------
/manager.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "fmt"
8 | "io/ioutil"
9 | "os"
10 | "path/filepath"
11 | "strings"
12 | "sync"
13 | "text/template"
14 |
15 | "github.com/alash3al/go-color"
16 | "github.com/hashicorp/hcl"
17 | "github.com/robfig/cron/v3"
18 | )
19 |
20 | // Manager - a macros manager
21 | type Manager struct {
22 | macros map[string]*Macro
23 | compiled *template.Template
24 | cron *cron.Cron
25 | sync.RWMutex
26 | }
27 |
28 | // NewManager - initialize a new manager
29 | func NewManager(configpath string) (*Manager, error) {
30 | manager := new(Manager)
31 | manager.macros = make(map[string]*Macro)
32 | manager.compiled = template.New("main")
33 | manager.cron = cron.New()
34 |
35 | for _, p := range strings.Split(configpath, ",") {
36 | files, _ := filepath.Glob(p)
37 |
38 | if len(files) < 1 {
39 | return nil, fmt.Errorf("invalid path (%s)", p)
40 | }
41 |
42 | for _, file := range files {
43 | data, err := ioutil.ReadFile(file)
44 | if err != nil {
45 | return nil, err
46 | }
47 |
48 | var config map[string]*Macro
49 | if err := hcl.Unmarshal(data, &config); err != nil {
50 | return nil, err
51 | }
52 |
53 | for k, v := range config {
54 | manager.macros[k] = v
55 | _, err := manager.compiled.New(k).Parse(v.Exec)
56 | if err != nil {
57 | return nil, err
58 | }
59 | v.manager = manager
60 | v.name = k
61 | v.Trigger.Webhook = strings.TrimSpace(v.Trigger.Webhook)
62 | v.Trigger.Macro = strings.TrimSpace(v.Trigger.Macro)
63 |
64 | if strings.TrimSpace(v.Cron) != "" {
65 | (func(v *Macro) {
66 | _, err := manager.cron.AddFunc(v.Cron, func() {
67 | fmt.Println(color.YellowString("=> Executing cron " + v.name))
68 | if _, err := v.Call(map[string]interface{}{}); err != nil {
69 | fmt.Println(color.RedString("=> Faild executing cron " + v.name + " due to an error: " + err.Error()))
70 | } else {
71 | fmt.Println(color.GreenString("=> Executing cron " + v.name + " succeeded!"))
72 | }
73 | })
74 |
75 | if err != nil {
76 | fmt.Println(color.RedString(err.Error()))
77 | os.Exit(1)
78 | }
79 | })(v)
80 | }
81 | }
82 | }
83 | }
84 |
85 | manager.cron.Start()
86 |
87 | return manager, nil
88 | }
89 |
90 | // Get - fetches the required macro
91 | func (m *Manager) Get(macro string) *Macro {
92 | m.RLock()
93 | defer m.RUnlock()
94 |
95 | return m.macros[macro]
96 | }
97 |
98 | // Size - return the size of the currently loaded configs
99 | func (m *Manager) Size() int {
100 | return len(m.macros)
101 | }
102 |
103 | // List - return a list of registered macros
104 | func (m *Manager) List() (ret []string) {
105 | for k := range m.macros {
106 | ret = append(ret, k)
107 | }
108 |
109 | return ret
110 | }
111 |
--------------------------------------------------------------------------------
/routes.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "strings"
8 |
9 | "github.com/labstack/echo"
10 | )
11 |
12 | // routeIndex - the index route
13 | func routeIndex(c echo.Context) error {
14 | return c.JSON(200, map[string]interface{}{
15 | "success": true,
16 | "message": "Welcome!",
17 | })
18 | }
19 |
20 | // routeExecMacro - execute the requested macro
21 | func routeExecMacro(c echo.Context) error {
22 | macro := c.Get("macro").(*Macro)
23 | input := make(map[string]interface{})
24 | body := make(map[string]interface{})
25 |
26 | c.Bind(&body)
27 |
28 | for k := range c.QueryParams() {
29 | input[k] = c.QueryParam(k)
30 | }
31 |
32 | for k, v := range body {
33 | input[k] = v
34 | }
35 |
36 | headers := c.Request().Header
37 | for k, v := range headers {
38 | input["http_"+strings.Replace(strings.ToLower(k), "-", "_", -1)] = v[0]
39 | }
40 |
41 | out, err := macro.Call(input)
42 | if err != nil {
43 | code := errStatusCodeMap[err]
44 | if code < 1 {
45 | code = 500
46 | }
47 | return c.JSON(code, map[string]interface{}{
48 | "success": false,
49 | "error": err.Error(),
50 | "data": out,
51 | })
52 | }
53 |
54 | return c.JSON(200, map[string]interface{}{
55 | "success": true,
56 | "data": out,
57 | })
58 | }
59 |
--------------------------------------------------------------------------------
/server_resp.go:
--------------------------------------------------------------------------------
1 | package main
2 |
3 | import (
4 | "encoding/json"
5 | "fmt"
6 | "strings"
7 |
8 | "github.com/tidwall/redcon"
9 | )
10 |
11 | func initRESPServer() error {
12 | return redcon.ListenAndServe(
13 | *flagRESPListenAddr,
14 | func(conn redcon.Conn, cmd redcon.Command) {
15 | // handles any panic
16 | defer (func() {
17 | if err := recover(); err != nil {
18 | conn.WriteError(fmt.Sprintf("fatal error: %s", (err.(error)).Error()))
19 | }
20 | })()
21 |
22 | // normalize the todo action "command"
23 | // normalize the command arguments
24 | todo := strings.TrimSpace(string(cmd.Args[0]))
25 | todoNormalized := strings.ToLower(todo)
26 | args := []string{}
27 | for _, v := range cmd.Args[1:] {
28 | v := strings.TrimSpace(string(v))
29 | args = append(args, v)
30 | }
31 |
32 | // internal command to pick a database
33 | if todoNormalized == "select" {
34 | conn.WriteString("OK")
35 | return
36 | }
37 |
38 | // internal ping-pong
39 | if todoNormalized == "ping" {
40 | conn.WriteString("PONG")
41 | return
42 | }
43 |
44 | // ECHO
45 | if todoNormalized == "echo" {
46 | conn.WriteString(strings.Join(args, " "))
47 | return
48 | }
49 |
50 | // HELP|INFO|LIST
51 | if todoNormalized == "list" || todoNormalized == "help" || todoNormalized == "info" {
52 | conn.WriteArray(macrosManager.Size())
53 | for _, v := range macrosManager.List() {
54 | conn.WriteBulkString(v)
55 | }
56 | return
57 | }
58 |
59 | // close the connection
60 | if todoNormalized == "quit" {
61 | conn.WriteString("OK")
62 | conn.Close()
63 | return
64 | }
65 |
66 | macro := macrosManager.Get(todo)
67 | if nil == macro {
68 | conn.WriteError("not found")
69 | conn.Close()
70 | return
71 | }
72 |
73 | var input map[string]interface{}
74 | if len(args) > 0 {
75 | json.Unmarshal([]byte(args[0]), &input)
76 | }
77 |
78 | // handle our command
79 | commandExecMacro(conn, macro, input)
80 | },
81 | func(conn redcon.Conn) bool {
82 | conn.SetContext(map[string]interface{}{})
83 | return true
84 | },
85 | nil,
86 | )
87 | }
88 |
89 | // commandExecMacro - resp command handler
90 | func commandExecMacro(conn redcon.Conn, macro *Macro, input map[string]interface{}) {
91 | out, err := macro.Call(input)
92 | if err != nil {
93 | conn.WriteArray(2)
94 | conn.WriteInt(0)
95 |
96 | j, _ := json.Marshal(err.Error())
97 |
98 | conn.WriteBulk(j)
99 |
100 | return
101 | }
102 |
103 | jsonOUT, _ := json.Marshal(out)
104 |
105 | conn.WriteArray(2)
106 | conn.WriteInt(1)
107 | conn.WriteBulk(jsonOUT)
108 | }
109 |
--------------------------------------------------------------------------------
/server_rest.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "strings"
8 |
9 | "github.com/labstack/echo"
10 | "github.com/labstack/echo/middleware"
11 | )
12 |
13 | // initialize RESTful server
14 | func initRESTServer() error {
15 | e := echo.New()
16 | e.HideBanner = true
17 | e.HidePort = true
18 |
19 | e.Pre(middleware.RemoveTrailingSlash())
20 | e.Use(middleware.CORS())
21 | e.Use(middleware.GzipWithConfig(middleware.GzipConfig{Level: 9}))
22 | e.Use(middleware.Recover())
23 |
24 | e.GET("/", routeIndex)
25 | e.Any("/:macro", routeExecMacro, middlewareAuthorize)
26 |
27 | return e.Start(*flagRESTListenAddr)
28 | }
29 |
30 | // middlewareAuthorize - the authorizer middleware
31 | func middlewareAuthorize(next echo.HandlerFunc) echo.HandlerFunc {
32 | return func(c echo.Context) error {
33 | if strings.HasPrefix(c.Param("macro"), "_") {
34 | return c.JSON(403, map[string]interface{}{
35 | "success": false,
36 | "error": "access not allowed",
37 | })
38 | }
39 |
40 | macro := macrosManager.Get(c.Param("macro"))
41 | if macro == nil {
42 | return c.JSON(404, map[string]interface{}{
43 | "success": false,
44 | "error": "resource not found",
45 | })
46 | }
47 |
48 | if len(macro.Methods) < 1 {
49 | macro.Methods = []string{c.Request().Method}
50 | }
51 |
52 | methodIsAllowed := false
53 | for _, method := range macro.Methods {
54 | method = strings.ToUpper(method)
55 | if c.Request().Method == method {
56 | methodIsAllowed = true
57 | break
58 | }
59 | }
60 |
61 | if !methodIsAllowed {
62 | return c.JSON(405, map[string]interface{}{
63 | "success": false,
64 | "error": "method not allowed",
65 | })
66 | }
67 |
68 | c.Set("macro", macro)
69 |
70 | return next(c)
71 | }
72 | }
73 |
--------------------------------------------------------------------------------
/validate.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "fmt"
8 | "strings"
9 |
10 | "github.com/asaskevich/govalidator"
11 | )
12 |
13 | // Validate - validates the specified data against the specified validators
14 | func Validate(data map[string]interface{}, validators map[string][]string) map[string][]string {
15 | invalid, result := 0, map[string][]string{}
16 | for k, rules := range validators {
17 | result[k] = []string{}
18 | value, exists := data[k]
19 | valuestr := strings.TrimSpace(fmt.Sprintf("%v", value))
20 | for _, r := range rules {
21 | if r == "required" && !exists || valuestr == "" {
22 | invalid++
23 | result[k] = append(result[k], "required")
24 | } else if ruler, ok := govalidator.TagMap[r]; ok && !ruler(valuestr) {
25 | invalid++
26 | result[k] = append(result[k], r)
27 | } else {
28 | parts := strings.SplitN(r, ":", 2)
29 | if len(parts) < 2 {
30 | parts = append(parts, "")
31 | }
32 | r, args := parts[0], parts[1]
33 | args = strings.TrimSpace(args)
34 | if ruler, ok := govalidator.ParamTagMap[r]; ok {
35 | if !ruler(valuestr, strings.Split(args, ",")...) {
36 | invalid++
37 | result[k] = append(result[k], r)
38 | }
39 | }
40 | }
41 | }
42 |
43 | if len(result[k]) < 1 {
44 | delete(result, k)
45 | }
46 | }
47 | return result
48 | }
49 |
--------------------------------------------------------------------------------
/vars.go:
--------------------------------------------------------------------------------
1 | // Copyright 2018 The SQLer Authors. All rights reserved.
2 | // Use of this source code is governed by a Apache 2.0
3 | // license that can be found in the LICENSE file.
4 | package main
5 |
6 | import (
7 | "errors"
8 | "flag"
9 | "runtime"
10 | )
11 |
12 | var (
13 | flagDBDriver = flag.String("driver", "mysql", "the sql driver to be used")
14 | flagDBDSN = flag.String("dsn", "root:root@tcp(127.0.0.1)/test?multiStatements=true", "the data source name for the selected engine")
15 | flagAPIFile = flag.String("config", "./config.example.hcl", "the config file(s) that contains your endpoints configs, it accepts comma seprated list of glob style pattern")
16 | flagRESTListenAddr = flag.String("rest", ":8025", "the http restful api listen address")
17 | flagRESPListenAddr = flag.String("resp", ":3678", "the resp (redis protocol) server listen address")
18 | flagWorkers = flag.Int("workers", runtime.NumCPU(), "the maximum workers count")
19 | flagSQLSeparator = flag.String("sep", `---\\--`, "multi sql query separator")
20 | )
21 |
22 | var (
23 | errNoMacroFound = errors.New("Resource not found")
24 | errValidationError = errors.New("Validation error")
25 | errAuthorizationError = errors.New("Authorization Error")
26 | )
27 |
28 | var (
29 | errStatusCodeMap = map[error]int{
30 | errNoMacroFound: 404,
31 | errValidationError: 422,
32 | errAuthorizationError: 401,
33 | }
34 | )
35 |
36 | var (
37 | macrosManager *Manager
38 | )
39 |
40 | const (
41 | sqlerVersion = "v2.1"
42 | sqlerBrand = `
43 |
44 | ____ ___ _
45 | / ___| / _ \| | ___ _ __
46 | \___ \| | | | | / _ \ '__|
47 | ___) | |_| | |__| __/ |
48 | |____/ \__\_\_____\___|_|
49 |
50 | turn your SQL queries into safe valid RESTful apis.
51 |
52 | `
53 | )
54 |
--------------------------------------------------------------------------------
/website/index.html:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 | SQLer - unleash the power of SQL
9 |
10 |
11 |
12 |
13 |
14 |
15 |