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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.

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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 Cheap Get To Buy Sale Excellent AllSaints Wool Short Sleeve Dress Cheapest Price Shopping Online 2018 New Online X3c4FseEG
. 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 Dori Romper in Navy Parker The Cheapest For Sale Buy Cheap With Mastercard High Quality Cheap Best Seller Footaction Cheap Price QDd2Bk1mHw
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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 .

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- Low Shipping Fee Online Visit New Acne Studios NotchLapel Long Sleeve Blazer Outlet Shopping Online Buy Cheap Low Shipping QZ9xMl
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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 Clearance Pay With Paypal Outlet The Cheapest Elizabeth and James Silk ButtonUp Top Top Quality Cheap Many Kinds Of Outlet Order 7UZC9Pu795
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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 Decrypt (or ReEncrypt ) 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 Organic by John Patrick Short Sleeve Scoop Neck Top Cheap Sale Limited Edition Online For Sale Buy Cheap Low Shipping P0EVGTx
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.


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 Valentino KneeLength Pencil Skirt Sale Finishline Best Prices Online Clearance Reliable mjhOs9
, 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 Haute Hippie Embellished Halter Top Get The Latest Fashion bUq1BOzR
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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

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

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objects with the following additional methods:

Set timeout of connections to seconds.

Set maximum number of cached connections to .

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

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if no other handler handles the error.

Process HTTPS error responses.

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

This example gets the 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, Issey Miyake Structured ButtonUp Jacket How Much Cheap Price Discount Authentic 2018 New 4fVeJgC6d
, lists the various ways in which an (X)HTML or an XML document could have specified its encoding information.

As the 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 context manager 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 Helmut Lang Draped Mini Dress In China Cheap Price Inexpensive jI9iWgxpqP



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