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Add a header that will not be added to a redirected request.

Return whether the instance has the named header (checks both regular and unredirected).

Remove named header from the request instance (both from regular and unredirected headers).

New in version 3.4.

Return the URL given in the constructor.

Changed in version 3.4.

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Prepare the request by connecting to a proxy server. The host and type will replace those of the instance, and the instance’s selector will be the original URL given in the constructor.

Return the value of the given header. If the header is not present, return the default value.

Return a list of tuples (header_name, header_value) of the Request headers.

Changed in version 3.4: The request methods add_data, has_data, get_data, get_type, get_host, get_selector, get_origin_req_host and is_unverifiable that were deprecated since 3.3 have been removed.

22.6.2. OpenerDirector Objects

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instances have the following methods:

OpenerDirector objects open URLs in three stages:

The order in which these methods are called within each stage is determined by sorting the handler instances.

should be an instance of Diane von Furstenberg Wool VNeck Dress Unisex Buy Cheap New FLjBaNWsSR
. The following methods are searched, and added to the possible chains (note that HTTP errors are a special case).

Open the given (which can be a request object or a string), optionally passing the given . Arguments, return values and exceptions raised are the same as those of Sale Cheap Buy Cheap Best FRAME Long Sleeve Sweater Free Shipping Footaction Nnby7
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). The optional parameter specifies a timeout in seconds for blocking operations like the connection attempt (if not specified, the global default timeout setting will be used). The timeout feature actually works only for HTTP, HTTPS and FTP connections).

Handle an error of the given protocol. This will call the registered error handlers for the given protocol with the given arguments (which are protocol specific). The HTTP protocol is a special case which uses the HTTP response code to determine the specific error handler; refer to the methods of the handler classes.

Return values and exceptions raised are the same as those of Pinstriped Wool Flared Pants Black Tom Ford Store Sale V0kxjref9B
.

Every handler with a method named like has that method called to pre-process the request.

Handlers with a method named like are called to handle the request. This stage ends when a handler either returns a non- Cheap Sale 2018 Unisex For Love amp; Lemons Lace Maxi Dress w/ Tags Clearance Outlet Largest Supplier Sale Online Extremely Online Browse For Sale rFS80
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English
AWS Key Management Service
Developer Guide

Encryption context is a set of key-value pairs that you can pass to AWS KMS when you call the Encrypt , High Rise Pants Maison Scotch Countdown Package Where To Buy Low Price Quality Original b1VBrO3
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APIs. It is checked for integrity but not stored as part of the ciphertext that is returned. Although the encryption context is not included in the ciphertext, it is cryptographically bound to the ciphertext during encryption and must be passed again when you call the Prada LaceTrimmed Midi Dress Free Shipping Big Discount rjjKtz5y8u
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) API. Decryption only succeeds if the encryption context you pass for decryption is exactly the same as the encryption context you passed during encryption. The encryption context is logged by AWS CloudTrail.

To learn how to use encryption context to protect the integrity of encrypted data, see the post How to Protect the Integrity of Your Encrypted Data by Using AWS Key Management Service and EncryptionContext on the AWS Security Blog.

Encryption context can consist of any values that you want. However, because it is not encrypted and because it is logged if CloudTrail logging is turned on, your encryption context should not include sensitive information. We further recommend that your encryption context describe the data being encrypted or decrypted so that you can better understand the CloudTrail log entries produced by AWS KMS. For example, Amazon EBS uses the ID of the encrypted volume as the encryption context for server-side encryption. If you are encrypting a file, you might use part of the file path as encryption context.

Topics

Encryption Context in Grants and Key Policies

In addition to using encryption context to check ciphertext integrity and authenticity, AWS KMS supports authorization by using grants and key policies that incorporate encryption context. Authorization that uses encryption context more tightly controls access to encrypted resources. When you Fleecepaneled Printed Cottonjersey Hooded Top White Alexander Wang Clearance Brand New Unisex Cheap Websites Where Can You Find FNIzbAuk6A
, for example, you can optionally specify a set of constraints that specify an encryption context that unambiguously identifies the resource to which long-term access is being granted. For example, consider encrypted volumes with Amazon EBS and Amazon EC2: When an EBS volume is attached to an EC2 instance, a grant is created that allows only that instance to decrypt only that volume. This is accomplished by encoding the volume ID as the encryption context in the Lennon Skirt Alice amp; Olivia Cheap Free Shipping Cheap Supply Sale Online CuyqSdwvZ
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API. Without the encryption context in the constraint, the Amazon EC2 instance would obtain access to all volumes encrypted under the customer master key (CMK) rather than a specific volume.

RFC 2397

22.6.19. FTPHandler Objects Miracle Dress in Blue Zhivago Cheap Sale How Much Clearance Release Dates Free Shipping Lowest Price 4NTiRAo1n2

Open the FTP file indicated by . The login is always done with empty username and password.

22.6.20. CacheFTPHandler Objects St John Chain Trim Knit Jacket Hot Sale 1FV3l0

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objects with the following additional methods:

Set timeout of connections to seconds.

Set maximum number of cached connections to .

22.6.21. UnknownHandler Objects Store Online Super Brunello Cucinelli Virgin Wool Pencil Skirt ahbSj5T5

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exception.

22.6.22. HTTPErrorProcessor Objects Haute Hippie Long Sleeve KneeLength Dress Sale Official Inexpensive Recommend Cheap Free Shipping Supply Outlet Wiki v4VDuNYWR

For 200 error codes, the response object is returned immediately.

For non-200 error codes, this simply passes the job on to the handler methods, via . Eventually, Order Cheap Online Women Black Genuine Leather Jacket with Gold Stars Leather Skin Pictures Cheap Online Free Shipping Cheap Online mS9oNZ
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if no other handler handles the error.

Process HTTPS error responses.

The behavior is same as Best Seller See by Chloé Colorblock Mini Dress Sale Reliable Cheap Sale Store W9JMMoN6
.

In addition to the examples below, more examples are given in HOWTO Fetch Internet Resources Using The urllib Package .

This example gets the python.org main page and displays the first 300 bytes of it.

>>>

Note that urlopen returns a bytes object. This is because there is no way for urlopen to automatically determine the encoding of the byte stream it receives from the HTTP server. In general, a program will decode the returned bytes object to string once it determines or guesses the appropriate encoding.

The following W3C document, Buy Cheap Best Seller Feathertrimmed Cotton Trench Coat Black Prada Sale Reliable Outlet Locations Sale Online DHyMKM58
, lists the various ways in which an (X)HTML or an XML document could have specified its encoding information.

As the python.org website uses utf-8 encoding as specified in its meta tag, we will use the same for decoding the bytes object.

>>>

It is also possible to achieve the same result without using the Paige Denim LowRise Cropped Pants Cheap Sale Shopping Online uOo5VIlD
approach.

>>>

In the following example, we are sending a data-stream to the stdin of a CGI and reading the data it returns to us. Note that this example will only work when the Python installation supports SSL.

>>>

The code for the sample CGI used in the above example is:

Here is an example of doing a PUT request using Proenza Schouler Bouclé Mini Skirt View Sale Online Sale Official c48zaiQ
:

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