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Z e � d�Z dd� Z!ddd�Z"dd� Z#dd� Z$G dd� de%�Z&dS )z8Basic message object for the email package object model.� )�absolute_import�division�unicode_literals)�list�range�str�zip�MessageN)�BytesIO�StringIO)�
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| t� |�f S d| |f S n| S dS ) a~ Convenience function to format and return a key=value pair.
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be encoded according to RFC2231 rules, using the utf-8 charset and
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A message object is defined as something that has a bunch of RFC 2822
headers and a payload. It may optionally have an envelope header
(a.k.a. Unix-From or From_ header). If the message is a container (i.e. a
multipart or a message/rfc822), then the payload is a list of Message
objects, otherwise it is a string.
Message objects implement part of the `mapping' interface, which assumes
there is exactly one occurrence of the header per message. Some headers
do in fact appear multiple times (e.g. Received) and for those headers,
you must use the explicit API to set or get all the headers. Not all of
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c C s< || _ t� | _d | _d | _d | _d | _| _g | _d| _ d S )Nz
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_default_type)�selfr; r r r �__init__| s zMessage.__init__zutf-8)�encodingc C s | � � S )zwReturn the entire formatted message as a string.
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header.
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r )� GeneratorF)� mangle_from_� maxheaderlen)�unixfrom)Z future.backports.email.generatorrI r �flatten�getvalue)rD rL rK rI �fp�gr r r rG � s
zMessage.as_stringc C s t | jt�S )z6Return True if the message consists of multiple parts.)r" r> r )rD r r r � is_multipart� s zMessage.is_multipartc C s
|| _ d S )N)r= )rD rL r r r � set_unixfrom� s zMessage.set_unixfromc C s | j S )N)r= )rD r r r � get_unixfrom� s zMessage.get_unixfromc C s$ | j dkr|g| _ n | j �|� dS )z�Add the given payload to the current payload.
The current payload will always be a list of objects after this method
is called. If you want to set the payload to a scalar object, use
set_payload() instead.
N)r> r2 )rD �payloadr r r �attach� s
zMessage.attachNc C s� | � � r(|rdS |dkr | jS | j| S |dk rNt| jt�sNtdt| j� ��| j}t| �dd���� }t|t��rt|�}t �
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�r� |S X t|t��r�|S |S )aZ Return a reference to the payload.
The payload will either be a list object or a string. If you mutate
the list object, you modify the message's payload in place. Optional
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Optional decode is a flag indicating whether the payload should be
decoded or not, according to the Content-Transfer-Encoding header
(default is False).
When True and the message is not a multipart, the payload will be
decoded if this header's value is `quoted-printable' or `base64'. If
some other encoding is used, or the header is missing, or if the
payload has bogus data (i.e. bogus base64 or uuencoded data), the
payload is returned as-is.
If the message is a multipart and the decode flag is True, then None
is returned.
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zMessage.get_payloadc C s || _ |dk r| �|� dS )z�Set the payload to the given value.
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set_charset() for details.
N)r> � set_charset)rD rT r r r r � set_payload s zMessage.set_payloadc C s� |dkr | � d� d| _dS t|t�s.t|�}|| _d| krH| �dd� d| krf| jdd|�� d� n| �d|�� � ||�� kr�|�| j�| _d| kr�|� � }y || � W n. t
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r� |�| j�| _| �d|� Y nX dS ) a� Set the charset of the payload to a given character set.
charset can be a Charset instance, a string naming a character set, or
None. If it is a string it will be converted to a Charset instance.
If charset is None, the charset parameter will be removed from the
Content-Type field. Anything else will generate a TypeError.
The message will be assumed to be of type text/* encoded with
charset.input_charset. It will be converted to charset.output_charset
and encoded properly, if needed, when generating the plain text
representation of the message. MIME headers (MIME-Version,
Content-Type, Content-Transfer-Encoding) will be added as needed.
Nr z MIME-Versionz1.0z Content-Typez
text/plain)r zContent-Transfer-Encoding) � del_paramr? r" �Charset�
add_header�get_output_charset� set_param� body_encoder> �get_body_encodingr] )rD r rj r r r rp s,
zMessage.set_charsetc C s | j S )zKReturn the Charset instance associated with the message's payload.
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t | j�S )z9Return the total number of headers, including duplicates.)r! r< )rD r r r �__len__M s zMessage.__len__c C s
| � |�S )a- Get a header value.
Return None if the header is missing instead of raising an exception.
Note that if the header appeared multiple times, exactly which
occurrence gets returned is undefined. Use get_all() to get all
the values matching a header field name.
)r_ )rD �namer r r � __getitem__Q s zMessage.__getitem__c C sv | j �|�}|r\|�� }d}x>| jD ]4\}}|�� |kr$|d7 }||kr$td�||���q$W | j�| j �||�� dS )z�Set the value of a header.
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name. Use __delitem__() first to delete any existing headers.
r r z/There may be at most {} {} headers in a messageN)r; �header_max_countr1 r< �
ValueError�formatr2 �header_store_parse)rD r{ �val� max_count�lname�found�k�vr r r � __setitem__\ s zMessage.__setitem__c C sF |� � }t� }x,| jD ]"\}}|� � |kr|�||f� qW || _dS )zwDelete all occurrences of a header, if present.
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N)r1 r r< r2 )rD r{ �
newheadersr� r� r r r � __delitem__n s zMessage.__delitem__c C s |� � dd� | jD �kS )Nc S s g | ]\}}|� � �qS r )r1 )�.0r� r� r r r �
<listcomp>{ s z(Message.__contains__.<locals>.<listcomp>)r1 r< )rD r{ r r r � __contains__z s zMessage.__contains__c c s x| j D ]\}}|V qW d S )N)r< )rD �fieldr* r r r �__iter__} s zMessage.__iter__c C s dd� | j D �S )a. Return a list of all the message's header field names.
These will be sorted in the order they appeared in the original
message, or were added to the message, and may contain duplicates.
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list.
c S s g | ] \}}|�qS r r )r� r� r� r r r r� � s z Message.keys.<locals>.<listcomp>)r< )rD r r r �keys� s z Message.keysc s � fdd�� j D �S )a) Return a list of all the message's header values.
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message, or were added to the message, and may contain duplicates.
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list.
c s g | ]\}}� j �||��qS r )r; �header_fetch_parse)r� r� r� )rD r r r� � s z"Message.values.<locals>.<listcomp>)r< )rD r )rD r �values� s
zMessage.valuesc s � fdd�� j D �S )a' Get all the message's header fields and values.
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message, or were added to the message, and may contain duplicates.
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list.
c s" g | ]\}}|� j �||�f�qS r )r; r� )r� r� r� )rD r r r� � s z!Message.items.<locals>.<listcomp>)r< )rD r )rD r �items� s
z
Message.itemsc C s: |� � }x,| jD ]"\}}|� � |kr| j�||�S qW |S )z~Get a header value.
Like __getitem__() but return failobj instead of None when the field
is missing.
)r1 r< r; r� )rD r{ �failobjr� r� r r r r_ � s
z Message.getc C s | j �||f� dS )z�Store name and value in the model without modification.
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N)r< r2 )rD r{ r* r r r �set_raw� s zMessage.set_rawc C s t | j�� �S )z�Return the (name, value) header pairs without modification.
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)�iterr< �copy)rD r r r � raw_items� s zMessage.raw_itemsc C sL g }|� � }x2| jD ](\}}|� � |kr|�| j�||�� qW |sH|S |S )aQ Return a list of all the values for the named field.
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message, and may contain duplicates. Any fields deleted and
re-inserted are always appended to the header list.
If no such fields exist, failobj is returned (defaults to None).
)r1 r< r2 r; r� )rD r{ r� r� r� r� r r r �get_all� s zMessage.get_allc K st g }xH|� � D ]<\}}|dkr2|�|�dd�� q|�t|�dd�|�� qW |dk rb|�d|� t�|�| |< dS )u� Extended header setting.
name is the header field to add. keyword arguments can be used to set
additional parameters for the header field, with underscores converted
to dashes. Normally the parameter will be added as key="value" unless
value is None, in which case only the key will be added. If a
parameter value contains non-ASCII characters it can be specified as a
three-tuple of (charset, language, value), in which case it will be
encoded according to RFC2231 rules. Otherwise it will be encoded using
the utf-8 charset and a language of ''.
Examples:
msg.add_header('content-disposition', 'attachment', filename='bud.gif')
msg.add_header('content-disposition', 'attachment',
filename=('utf-8', '', 'Fußballer.ppt'))
msg.add_header('content-disposition', 'attachment',
filename='Fußballer.ppt'))
N�_�-r )r� r2 rW r+ �insert� SEMISPACEre )rD �_name�_value�_params�partsr� r� r r r rt � s zMessage.add_headerc C s^ |� � }xPttt| j��| j�D ].\}\}}|� � |kr | j�||�| j|< P q W t|��dS )z�Replace a header.
Replace the first matching header found in the message, retaining
header order and case. If no matching header was found, a KeyError is
raised.
N)r1 r r r! r< r; r� �KeyError)rD r� r� r7 r� r� r r r �replace_header� s $ zMessage.replace_headerc C sH t � }| �d|�}||kr"| �� S t|�d �� }|�d�dkrDdS |S )a0 Return the message's content type.
The returned string is coerced to lower case of the form
`maintype/subtype'. If there was no Content-Type header in the
message, the default type as given by get_default_type() will be
returned. Since according to RFC 2045, messages always have a default
type this will always return a value.
RFC 2045 defines a message's default type to be text/plain unless it
appears inside a multipart/digest container, in which case it would be
message/rfc822.
z content-typer �/r z
text/plain)�objectr_ �get_default_typer r1 r/ )rD �missingr* �ctyper r r �get_content_type s
zMessage.get_content_typec C s | � � }|�d�d S )z�Return the message's main content type.
This is the `maintype' part of the string returned by
get_content_type().
r� r )r� �split)rD r� r r r �get_content_maintype s z Message.get_content_maintypec C s | � � }|�d�d S )z�Returns the message's sub-content type.
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get_content_type().
r� r )r� r� )rD r� r r r �get_content_subtype( s zMessage.get_content_subtypec C s | j S )a Return the `default' content type.
Most messages have a default content type of text/plain, except for
messages that are subparts of multipart/digest containers. Such
subparts have a default content type of message/rfc822.
)rC )rD r r r r� 1 s zMessage.get_default_typec C s
|| _ dS )z�Set the `default' content type.
ctype should be either "text/plain" or "message/rfc822", although this
is not enforced. The default content type is not stored in the
Content-Type header.
N)rC )rD r� r r r �set_default_type: s zMessage.set_default_typec C s� t � }| �||�}||kr |S g }xdt|�D ]X}y$|�dd�\}}|�� }|�� }W n tk
rt |�� }d}Y nX |�||f� q,W t�|�}|S )Nr- r r ) r� r_ r8 r� r r~ r2 r
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decode_params) rD r� �headerr� r* �params�pr{ r� r r r �_get_params_preserveC s
z Message._get_params_preserve� content-typeTc C s8 t � }| �||�}||kr |S |r0dd� |D �S |S dS )am Return the message's Content-Type parameters, as a list.
The elements of the returned list are 2-tuples of key/value pairs, as
split on the `=' sign. The left hand side of the `=' is the key,
while the right hand side is the value. If there is no `=' sign in
the parameter the value is the empty string. The value is as
described in the get_param() method.
Optional failobj is the object to return if there is no Content-Type
header. Optional header is the header to search instead of
Content-Type. If unquote is True, the value is unquoted.
c S s g | ]\}}|t |�f�qS r )r: )r� r� r� r r r r� j s z&Message.get_params.<locals>.<listcomp>N)r� r� )rD r� r� r9 r� r� r r r �
get_paramsX s
zMessage.get_paramsc C sJ || kr |S x8| � ||�D ](\}}|�� |�� kr|r>t|�S |S qW |S )a Return the parameter value if found in the Content-Type header.
Optional failobj is the object to return if there is no Content-Type
header, or the Content-Type header has no such parameter. Optional
header is the header to search instead of Content-Type.
Parameter keys are always compared case insensitively. The return
value can either be a string, or a 3-tuple if the parameter was RFC
2231 encoded. When it's a 3-tuple, the elements of the value are of
the form (CHARSET, LANGUAGE, VALUE). Note that both CHARSET and
LANGUAGE can be None, in which case you should consider VALUE to be
encoded in the us-ascii charset. You can usually ignore LANGUAGE.
The parameter value (either the returned string, or the VALUE item in
the 3-tuple) is always unquoted, unless unquote is set to False.
If your application doesn't care whether the parameter was RFC 2231
encoded, it can turn the return value into a string as follows:
param = msg.get_param('foo')
param = email.utils.collapse_rfc2231_value(rawparam)
)r� r1 r: )rD r r� r� r9 r� r� r r r rb n s zMessage.get_param� Content-Typer c C s� t |t�s|r|||f}|| kr2|�� dkr2d}n
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g�}q�W || �|�kr�| |= || |< dS )a� Set a parameter in the Content-Type header.
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replaced with the new value.
If header is Content-Type and has not yet been defined for this
message, it will be set to "text/plain" and the new parameter and
value will be appended as per RFC 2045.
An alternate header can specified in the header argument, and all
parameters will be quoted as necessary unless requote is False.
If charset is specified, the parameter will be encoded according to RFC
2231. Optional language specifies the RFC 2231 language, defaulting
to the empty string. Both charset and language should be strings.
z content-typez
text/plain)r� r )r� r9 N) r" r# r1 r_ rb r+ r� re r� ) rD r r* r� �requoter �languager� � old_param� old_value� append_paramr r r rv � s.
zMessage.set_paramc C s� || kr dS d}xR| j ||d�D ]@\}}|�� |�� kr |sJt|||�}q t�|t|||�g�}q W || �|�kr�| |= || |< dS )a> Remove the given parameter completely from the Content-Type header.
The header will be re-written in place without the parameter or its
value. All values will be quoted as necessary unless requote is
False. Optional header specifies an alternative to the Content-Type
header.
Nr )r� r9 )r� r1 r+ r� re r_ )rD r r� r� � new_ctyper� r� r r r rr � s zMessage.del_paramc C s� |� d�dkst�|�� dkr,| d= d| d< || kr@|| |< dS | j||d�}| |= || |< x(|dd� D ]\}}| �||||� qjW dS ) aK Set the main type and subtype for the Content-Type header.
type must be a string in the form "maintype/subtype", otherwise a
ValueError is raised.
This method replaces the Content-Type header, keeping all the
parameters in place. If requote is False, this leaves the existing
header's quoting as is. Otherwise, the parameters will be quoted (the
default).
An alternative header can be specified in the header argument. When
the Content-Type header is set, we'll always also add a MIME-Version
header.
r� r z content-typez mime-versionz1.0z MIME-VersionN)r� r9 )r/ r~ r1 r� rv )rD r^ r� r� r� r� r� r r r �set_type� s zMessage.set_typec C sD t � }| �d|d�}||kr*| �d|d�}||kr6|S t�|��� S )a@ Return the filename associated with the payload if present.
The filename is extracted from the Content-Disposition header's
`filename' parameter, and it is unquoted. If that header is missing
the `filename' parameter, this method falls back to looking for the
`name' parameter.
�filenamezcontent-dispositionr{ z content-type)r� rb r
�collapse_rfc2231_valuer )rD r� r� r� r r r � get_filename� s zMessage.get_filenamec C s, t � }| �d|�}||kr |S t�|��� S )z�Return the boundary associated with the payload if present.
The boundary is extracted from the Content-Type header's `boundary'
parameter, and it is unquoted.
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r� �rstrip)rD r� r� r� r r r � get_boundary s
zMessage.get_boundaryc C s t � }| �|d�}||kr$t�d��g }d}xB|D ]:\}}|�� dkr^|�dd| f� d}q2|�||f� q2W |s�|�dd| f� g }x�| jD ]�\} }
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a� Set the boundary parameter in Content-Type to 'boundary'.
This is subtly different than deleting the Content-Type header and
adding a new one with a new boundary parameter via add_header(). The
main difference is that using the set_boundary() method preserves the
order of the Content-Type header in the original message.
HeaderParseError is raised if the message has no Content-Type header.
z content-typez No Content-Type header foundFr� z"%s"Tr z%s=%sN) r� r� r �HeaderParseErrorr1 r2 r< r� re r; r� )rD r� r� r� � newparams�foundp�pk�pvr� �hr� r� r� r� r r r � set_boundary s2
zMessage.set_boundaryc C s� t � }| �d|�}||kr |S t|t�rr|d p2d}y |d �d�}t||�}W n ttfk
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r� |S X |�� S )z�Return the charset parameter of the Content-Type header.
The returned string is always coerced to lower case. If there is no
Content-Type header, or if that header has no charset parameter,
failobj is returned.
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zMessage.get_content_charsetc s � fdd�| � � D �S )a� Return a list containing the charset(s) used in this message.
The returned list of items describes the Content-Type headers'
charset parameter for this message and all the subparts in its
payload.
Each item will either be a string (the value of the charset parameter
in the Content-Type header of that part) or the value of the
'failobj' parameter (defaults to None), if the part does not have a
main MIME type of "text", or the charset is not defined.
The list will contain one string for each part of the message, plus
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