fix: invoke.go — forward Content-Length to proxied request (form POST fix)

Without ContentLength, Python BaseHTTPRequestHandler read 0 bytes from body.
operator v0.1.37, python runtime v0.1.4, pg-table-writer HTML form

examples/POSTGRES/resources.tf

@@ -126,13 +126,14 @@ resource "sless_trigger" "pg_info_http" {
   enabled  = true
 }
 
-# HTTP-функция читает строки из terraform_demo_table и возвращает JSON.
-# Использует те же credentials что и sql-runner.
-# Доступна по URL: https://sless.kube5s.ru/fn/<namespace>/pg-table-reader
+# HTTP-функции чтения и записи строк terraform_demo_table — в одном файле table_rw.py.
+# list_rows (GET) — читает все строки; add_row (POST {title}) — вставляет строку.
+# Доступны по URL: https://sless.kube5s.ru/fn/<namespace>/pg-table-reader
+#                 https://sless.kube5s.ru/fn/<namespace>/pg-table-writer
 resource "sless_function" "postgres_table_reader" {
   name        = "pg-table-reader"
   runtime     = "python3.11"
-  entrypoint  = "table_reader.list_rows"
+  entrypoint  = "table_rw.list_rows"
   memory_mb   = 128
   timeout_sec = 30
 
@@ -145,7 +146,7 @@ resource "sless_function" "postgres_table_reader" {
     PGSSLMODE  = "require"
   }
 
-  source_dir = "${path.module}/code/table-reader"
+  source_dir = "${path.module}/code/table-rw"
 
   depends_on = [sless_job.postgres_table_init_job]
 }
@@ -161,4 +162,35 @@ output "table_reader_url" {
   value = sless_trigger.postgres_table_reader_http.url
 }
 
+resource "sless_function" "postgres_table_writer" {
+  name        = "pg-table-writer"
+  runtime     = "python3.11"
+  entrypoint  = "table_rw.add_row"
+  memory_mb   = 128
+  timeout_sec = 30
+
+  env_vars = {
+    PGHOST     = local.pg_host
+    PGPORT     = "5432"
+    PGDATABASE = local.pg_database
+    PGUSER     = local.pg_username
+    PGPASSWORD = local.pg_password
+    PGSSLMODE  = "require"
+  }
+
+  source_dir = "${path.module}/code/table-rw"
+
+  depends_on = [sless_job.postgres_table_init_job]
+}
+
+resource "sless_trigger" "postgres_table_writer_http" {
+  name     = "pg-table-writer-http"
+  type     = "http"
+  function = sless_function.postgres_table_writer.name
+  enabled  = true
+}
+
+output "table_writer_url" {
+  value = sless_trigger.postgres_table_writer_http.url
+}