feat(sdk/go): implement mysql SDK for TinyGo (#1794)

Signed-off-by: Patrick <[email protected]>

Author: Patrick0308

examples/tinygo-outbound-mysql/.gitignore

@@ -0,0 +1,2 @@
+main.wasm
+.spin/

examples/tinygo-outbound-mysql/db/pets.sql

@@ -0,0 +1,4 @@
+CREATE TABLE pets (id INT PRIMARY KEY, name VARCHAR(100) NOT NULL, prey VARCHAR(100), is_finicky BOOL NOT NULL);
+INSERT INTO pets VALUES (1, 'Splodge', NULL, false);
+INSERT INTO pets VALUES (2, 'Kiki', 'Cicadas', false);
+INSERT INTO pets VALUES (3, 'Slats', 'Temptations', true);

examples/tinygo-outbound-mysql/go.mod

@@ -0,0 +1,9 @@
+module github.com/tinygo_mysql
+
+go 1.20
+
+require github.com/fermyon/spin/sdk/go v0.0.0
+
+require github.com/julienschmidt/httprouter v1.3.0 // indirect
+
+replace github.com/fermyon/spin/sdk/go v0.0.0 => ../../sdk/go/

examples/tinygo-outbound-mysql/go.sum

@@ -0,0 +1,4 @@
+github.com/fermyon/spin/sdk/go v1.4.1 h1:n8KTYTnkErTJdyMBBEtPmJe8dXrvMT6R7iVWbLRjq5E=
+github.com/fermyon/spin/sdk/go v1.4.1/go.mod h1:yb8lGesopgj/GwPzLPATxcOeqWZT/HjrzEFfwbztAXE=
+github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4dN7jwJOQ1U=
+github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=

examples/tinygo-outbound-mysql/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+
+	spinhttp "github.com/fermyon/spin/sdk/go/http"
+	"github.com/fermyon/spin/sdk/go/mysql"
+)
+
+type Pet struct {
+	ID        int64
+	Name      string
+	Prey      *string // nullable field must be a pointer
+	IsFinicky bool
+}
+
+func init() {
+	spinhttp.Handle(func(w http.ResponseWriter, r *http.Request) {
+
+		// addr is the environment variable set in `spin.toml` that points to the
+		// address of the Mysql server.
+		addr := os.Getenv("DB_URL")
+
+		db := mysql.Open(addr)
+		defer db.Close()
+
+		_, err := db.Query("REPLACE INTO pets VALUES (?, 'Maya', ?, ?);", 4, "bananas", true)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		rows, err := db.Query("SELECT * FROM pets")
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		var pets []*Pet
+		for rows.Next() {
+			var pet Pet
+			if err := rows.Scan(&pet.ID, &pet.Name, &pet.Prey, &pet.IsFinicky); err != nil {
+				fmt.Println(err)
+			}
+			pets = append(pets, &pet)
+		}
+		json.NewEncoder(w).Encode(pets)
+	})
+}
+
+func main() {}

examples/tinygo-outbound-mysql/spin.toml

@@ -0,0 +1,16 @@
+spin_manifest_version = "1"
+authors = ["Patrick Jiang <[email protected]>"]
+description = ""
+name = "tinygo-mysql"
+trigger = { type = "http", base = "/" }
+version = "0.1.0"
+
+[[component]]
+environment = { DB_URL = "mysql://spin:[email protected]/spin_dev" }
+id = "tinygo-mysql"
+source = "main.wasm"
+[component.trigger]
+route = "/..."
+[component.build]
+command = "tinygo build -target=wasi -gc=leaking -o main.wasm main.go"
+watch = ["**/*.go", "go.mod"]

sdk/go/Makefile

@@ -29,6 +29,7 @@ build-examples: $(EXAMPLES_DIR)/tinygo-redis/main.wasm
 build-examples: $(EXAMPLES_DIR)/tinygo-key-value/main.wasm
 build-examples: $(EXAMPLES_DIR)/tinygo-sqlite/main.wasm
 build-examples: $(EXAMPLES_DIR)/tinygo-llm/main.wasm
+build-examples: $(EXAMPLES_DIR)/tinygo-mysql/main.wasm
 
 $(EXAMPLES_DIR)/%/main.wasm: $(EXAMPLES_DIR)/%/main.go
 	tinygo build -target=wasi -gc=leaking -no-debug -o $@ $<
@@ -44,6 +45,7 @@ GENERATED_SPIN_REDIS     = redis/spin-redis.c redis/spin-redis.h
 GENERATED_KEY_VALUE      = key_value/key-value.c key_value/key-value.h
 GENERATED_SQLITE         = sqlite/sqlite.c sqlite/sqlite.h
 GENERATED_LLM            = llm/llm.c llm/llm.h
+GENERATED_OUTBOUND_MYSQL = mysql/outbound-mysql.c mysql/outbound-mysql.h 
 
 SDK_VERSION_SOURCE_FILE  = sdk_version/sdk-version-go-template.c
 
@@ -61,6 +63,7 @@ generate: $(GENERATED_OUTBOUND_HTTP) $(GENERATED_SPIN_HTTP)
 generate: $(GENERATED_OUTBOUND_REDIS) $(GENERATED_SPIN_REDIS)
 generate: $(GENERATED_SPIN_CONFIG) $(GENERATED_KEY_VALUE)
 generate: $(GENERATED_SQLITE) $(GENERATED_LLM)
+generate: $(GENERATED_OUTBOUND_MYSQL)
 generate: $(SDK_VERSION_DEST_FILES)
 
 $(SDK_VERSION_DEST_FILES): $(SDK_VERSION_SOURCE_FILE)
@@ -92,6 +95,9 @@ $(GENERATED_SQLITE):
 $(GENERATED_LLM):
 	wit-bindgen c --import ../../wit/ephemeral/llm.wit --out-dir ./llm
 
+$(GENERATED_OUTBOUND_MYSQL):
+	wit-bindgen c --import ../../wit/ephemeral/outbound-mysql.wit --out-dir ./mysql
+
 # ----------------------------------------------------------------------
 # Cleanup
 # ----------------------------------------------------------------------
@@ -102,6 +108,7 @@ clean:
 	rm -f $(GENERATED_OUTBOUND_REDIS) $(GENERATED_SPIN_REDIS)
 	rm -f $(GENERATED_KEY_VALUE) $(GENERATED_SQLITE)
 	rm -f $(GENERATED_LLM)
+	rm -f $(GENERATED_OUTBOUND_MYSQL)
 	rm -f $(GENERATED_SDK_VERSION)
 	rm -f http/testdata/http-tinygo/main.wasm
 	rm -f $(EXAMPLES_DIR)/http-tinygo/main.wasm
@@ -111,4 +118,5 @@ clean:
 	rm -f $(EXAMPLES_DIR)/tinygo-key-value/main.wasm
 	rm -f $(EXAMPLES_DIR)/tinygo-sqlite/main.wasm
 	rm -f $(EXAMPLES_DIR)/tinygo-llm/main.wasm
+	rm -f $(EXAMPLES_DIR)/tinygo-outbound-mysql/main.wasm
 	rm -f $(SDK_VERSION_DEST_FILES)