This practice is common enough that it has a name, these environment variables are commonly placed in a file `.env`, and the file is called a "dotenv".

!!! tip
    A file starting with a dot (`.`) is a hidden file in Unix-like systems, like Linux and macOS.

    But a dotenv file doesn't really have to have that exact filename.

This means that instead of the normal process of your users sending requests to your API, it's **your API** (or your app) that could **send requests to their system** (to their API, their app).

This is normally called a **webhook**.

## Webhooks steps

The process normally is that **you define** in your code what is the message that you will send, the **body of the request**.

type Writer struct {
	// opts are the configuration options for this Writer
	opts Options

	// f is the currently open file used for appends.
	// Writes to f are only synchronized once Close() is called,
	// or when files are being rotated.
	f *os.File

	pw *xioutil.PipeWriter
	pr *xioutil.PipeReader
}

// Write writes p into the current file, rotating if necessary.

<!-- 
  -- Note: this file contains a generated diagram. Use `./gradlew :architectureDoc` to generate 
  -->

# Gradle platform architecture

Gradle is arranged into coarse-grained components called "architecture modules" and "platforms".
See [ADR4](standards/0004-use-a-platform-architecture.md) for a definition of these terms.

The diagram below shows the current set of architecture modules and platforms:

	disksQuorum int

	// If set updates will be sent regularly to this channel.
	// Will not be closed when returned.
	updates    chan<- dataUsageEntry
	lastUpdate time.Time

	// updateCurrentPath should be called whenever a new path is scanned.
	updateCurrentPath func(string)
}

// Cache structure and compaction:
//
// A cache structure will be kept with a tree of usages.

* A particular program while it is **running** on the operating system, using the CPU, and storing things on memory. This is also called a **process**.

### What is a Process

The word **process** is normally used in a more specific way, only referring to the thing that is running in the operating system (like in the last point above):

				offline++
			}
		}
		if offline > 0 {
			tags["offline"] = offline
		}

		_, file, line, cok := runtime.Caller(1)
		if cok {
			tags["caller"] = fmt.Sprintf("%s:%d", file, line)
		}

		defer auditDanglingObjectDeletion(ctx, bucket, object, m.VersionID, tags)

		err = errFileNotFound
		if opts.VersionID != "" {

// Temp files created in default Tmp dir
var globalTestTmpDir = os.TempDir()

// reseed - returns a new seed every time the function is called.
func reseed() uint32 {
	return uint32(time.Now().UnixNano() + int64(os.Getpid()))
}

// nextSuffix - provides a new unique suffix every time the function is called.
func nextSuffix() string {
	randmu.Lock()
	r := randN
	// Initial seed required, generate one.
	if r == 0 {

## ASGI Servers

Let's go a little deeper into the details.

FastAPI uses a standard for building Python web frameworks and servers called <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr>. FastAPI is an ASGI web framework.

	loggingOptions.JSONEncoding = true
	if udsAddress != "" {
		loggingOptions.WithTeeToUDS(udsAddress, constants.UDSLogPath)
	}
	return loggingOptions
}

// CmdAdd is called for ADD requests
func CmdAdd(args *skel.CmdArgs) (err error) {
	// Defer a panic recover, so that in case if panic we can still return
	// a proper error to the runtime.
	defer func() {
		if e := recover(); e != nil {