Update README.md

Author: rafiki270

README.md

@@ -29,6 +29,174 @@ let s3 = try req.makeS3Signer() // or req.make(S3Signer.self)
 s3.headers(...)
 ```
 
+### Available methods
+
+```swift
+/// S3 client Protocol
+public protocol S3Client: Service {
+    
+    /// Get list of objects
+    func buckets(on: Container) throws -> Future<BucketsInfo>
+    
+    /// Create a bucket
+    func create(bucket: String, region: Region?, on container: Container) throws -> Future<Void>
+    
+    /// Delete a bucket wherever it is (WIP)
+//    func delete(bucket: String, on container: Container) throws -> Future<Void>
+    
+    /// Delete a bucket
+    func delete(bucket: String, region: Region?, on container: Container) throws -> Future<Void>
+    
+    /// Get bucket location (WIP)
+//    func location(bucket: String, on container: Container) throws -> Future<Bucket.Location>
+    
+    /// Get list of objects
+    func list(bucket: String, region: Region?, on container: Container) throws -> Future<BucketResults>
+    
+    /// Get list of objects
+    func list(bucket: String, region: Region?, headers: [String: String], on container: Container) throws -> Future<BucketResults>
+    
+    /// Upload file to S3
+    func put(file: File.Upload, headers: [String: String], on: Container) throws -> EventLoopFuture<File.Response>
+    
+    /// Upload file to S3
+    func put(file url: URL, destination: String, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(file url: URL, destination: String, bucket: String?, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(file path: String, destination: String, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(file path: String, destination: String, bucket: String?, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(string: String, destination: String, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(string: String, destination: String, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(string: String, mime: MediaType, destination: String, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(string: String, mime: MediaType, destination: String, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Upload file to S3
+    func put(string: String, mime: MediaType, destination: String, bucket: String?, access: AccessControlList, on: Container) throws -> Future<File.Response>
+    
+    /// Retrieve file data from S3
+    func get(fileInfo file: LocationConvertible, on container: Container) throws -> Future<File.Info>
+    
+    /// Retrieve file data from S3
+    func get(fileInfo file: LocationConvertible, headers: [String: String], on container: Container) throws -> Future<File.Info>
+    
+    /// Retrieve file data from S3
+    func get(file: LocationConvertible, on: Container) throws -> Future<File.Response>
+    
+    /// Retrieve file data from S3
+    func get(file: LocationConvertible, headers: [String: String], on: Container) throws -> Future<File.Response>
+    
+    /// Delete file from S3
+    func delete(file: LocationConvertible, on: Container) throws -> Future<Void>
+    
+    /// Delete file from S3
+    func delete(file: LocationConvertible, headers: [String: String], on: Container) throws -> Future<Void>
+}
+```
+
+### Example usage
+
+```swift
+public func routes(_ router: Router) throws {
+    
+    // Get all available buckets
+    router.get("buckets")  { req -> Future<BucketsInfo> in
+        let s3 = try req.makeS3Client()
+        return try s3.buckets(on: req)
+    }
+    
+    // Create new bucket
+    router.put("bucket")  { req -> Future<String> in
+        let s3 = try req.makeS3Client()
+        return try s3.create(bucket: "api-created-bucket", region: .euCentral1, on: req).map(to: String.self) {
+            return ":)"
+            }.catchMap({ (error) -> (String) in
+                if let error = error.s3ErroMessage() {
+                    return error.message
+                }
+                return ":("
+            }
+        )
+    }
+    
+    // Delete bucket
+    router.delete("bucket")  { req -> Future<String> in
+        let s3 = try req.makeS3Client()
+        return try s3.delete(bucket: "api-created-bucket", region: .euCentral1, on: req).map(to: String.self) {
+            return ":)"
+            }.catchMap({ (error) -> (String) in
+                if let error = error.s3ErroMessage() {
+                    return error.message
+                }
+                return ":("
+                }
+        )
+    }
+    
+    // Get list of objects
+    router.get("files")  { req -> Future<BucketResults> in
+        let s3 = try req.makeS3Client()
+        return try s3.list(bucket: "booststore", region: .usEast1, headers: [:], on: req).catchMap({ (error) -> (BucketResults) in
+            if let error = error.s3ErroMessage() {
+                print(error.message)
+            }
+            throw error
+        })
+    }
+    
+    // Demonstrate work with files
+    router.get("files/test") { req -> Future<String> in
+        let string = "Content of my example file"
+        
+        let fileName = "file-hu.txt"
+        
+        let s3 = try req.makeS3Client()
+        do {
+            return try s3.put(string: string, destination: fileName, access: .publicRead, on: req).flatMap(to: String.self) { putResponse in
+                print("PUT response:")
+                print(putResponse)
+                return try s3.get(file: fileName, on: req).flatMap(to: String.self) { getResponse in
+                    print("GET response:")
+                    print(getResponse)
+                    print(String(data: getResponse.data, encoding: .utf8) ?? "Unknown content!")
+                    return try s3.get(fileInfo: fileName, on: req).flatMap(to: String.self) { infoResponse in
+                        print("HEAD/Info response:")
+                        print(infoResponse)
+                        return try s3.delete(file: fileName, on: req).map() { response in
+                            print("DELETE response:")
+                            print(response)
+                            let json = try JSONEncoder().encode(infoResponse)
+                            return String(data: json, encoding: .utf8) ?? "Unknown content!"
+                            }.catchMap({ error -> (String) in
+                                if let error = error.s3ErroMessage() {
+                                    return error.message
+                                }
+                                return ":("
+                            }
+                        )
+                    }
+                }
+            }
+        } catch {
+            print(error)
+            fatalError()
+        }
+    }
+}
+```
+
 ## Support
 
 Join our [Slack](http://bit.ly/2B0dEyt), channel <b>#help-boost</b> to ... well, get help :)