feat: make helpers function available in the LAMBDA_TASK_ROOT folder (#6)

Author: skunxicat

Dockerfile

@@ -47,4 +47,5 @@ RUN chmod +x /var/runtime/bootstrap
 
 WORKDIR /var/task
 
-COPY task/handler.sh handler.sh
+COPY task/handler.sh handler.sh
+COPY task/helpers.sh helpers.sh

micro.Dockerfile

@@ -53,3 +53,4 @@ RUN chmod +x /var/runtime/bootstrap
 WORKDIR /var/task
 
 COPY task/handler.sh handler.sh
+COPY task/helpers.sh helpers.sh

task/helpers.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+
+# https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.html
+
+
+# https://docs.aws.amazon.com/lambda/latest/dg/services-apigateway.html#apigateway-example-event
+# https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-input-format
+# https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-output-format
+
+lambda_parse_event () {
+    local EVENT="$1"
+    # Extract commonly used fields
+    if echo "$EVENT" | jq -e '.requestContext' >/dev/null; then
+        export EVENT_BODY=$(echo "$EVENT" | jq -r '.body // empty')
+        export EVENT_QUERY=$(echo "$EVENT" | jq -c '.queryStringParameters // {}')
+        export EVENT_HEADERS=$(echo "$EVENT" | jq -c '.headers // {}')
+        export EVENT_PATH=$(echo "$EVENT" | jq -r '.path // empty')
+        export EVENT_HTTPMETHOD=$(echo "$EVENT" | jq -r '.httpMethod // empty')
+    else
+        # Handle other event types
+        export EVENT_TYPE=$(echo "$EVENT" | jq -r 'keys[0]' 2>/dev/null || echo "unknown")
+    fi
+}
+
+
+lambda_require_http_event () {
+    if [ -z "$EVENT_HTTPMETHOD" ]; then
+        lambda_error_response "Not an HTTP event" 400
+        exit 1
+    fi
+}
+
+# JSON response with CORS
+lambda_json_response() {
+    local data="$1"
+    local status="${2:-200}"
+    
+    jq -n \
+        --arg data "$data" \
+        --arg status "$status" \
+        '{
+            statusCode: ($status|tonumber),
+            body: $data,
+            headers: {
+                "Content-Type": "application/json",
+                "Access-Control-Allow-Origin": "*"
+            }
+        }'
+}
+
+# Error response
+lambda_error_response() {
+    local message="$1"
+    local status="${2:-400}"
+    lambda_json_response "$(jq -n --arg msg "$message" '{error: $msg}')" "$status"
+}
+
+# Success with data
+lambda_ok_response() {
+    local data="$1"
+    lambda_json_response "$data" 200
+}
+
+# Not found
+lambda_not_found_response() {
+    lambda_ok_response "Not found" 404
+}
+
+# Method not allowed
+lambda_method_not_allowed_response() {
+    lambda_ok_response "Method not allowed" 405
+}
+
+# lambda_log function 
+lambda_log() {
+    local message="$1"
+    local level="${2:-INFO}"
+    local timestamp=$(date +"%Y-%m-%d %H:%M:%S")
+    echo "$timestamp [$level] $message" >&2
+    
+}
+
+# lambda_log_error
+lambda_log_error() {
+    lambda_log "$1" "ERROR"
+}
+
+# lambda_log_info
+lambda_log_info() {
+    lambda_log "$1" "INFO"
+}
+
+# lambda_log_debug
+lambda_log_debug() {
+    lambda_log "$1" "DEBUG"
+}
+
+# lambda_log_warn
+lambda_log_warn() {
+    lambda_log "$1" "WARN"
+}
+

tiny.Dockerfile

@@ -34,3 +34,4 @@ RUN chmod +x /var/runtime/bootstrap
 WORKDIR /var/task
 
 COPY task/handler.sh handler.sh
+COPY task/helpers.sh helpers.sh