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[mimedecode.git] / mimedecode.py

diff --git a/mimedecode.py b/mimedecode.py
index 1edd170f606b94872b8f5e15f1f449126898e070..637e275e3b127c6598850237fafcec0ca325c856 100755 (executable)
--- a/mimedecode.py
+++ b/mimedecode.py
@@ -18,7 +18,7 @@ Broytman mimedecode.py version %s, %s
 def usage(code=0, errormsg=''):
     version(0)
     sys.stdout.write("""\
-Usage: %s [-h|--help] [-V|--version] [-cCDP] [-H|--host=hostname] [-f charset] [-d header] [-p header:param] [-beit mask] [-o output_file] [input_file [output_file]]
+Usage: %s [-h|--help] [-V|--version] [-cCDP] [-H|--host=hostname] [-f charset] [-d header1[,h2,...]|*[,-h1,...]] [-p header1[,h2,h3,...]:param1[,p2,p3,...]] [-r header1[,h2,...]|*[,-h1,...]] [-R header1[,h2,h3,...]:param1[,p2,p3,...]] [-beit mask] [-o output_file] [input_file [output_file]]
 """ % me)
     if errormsg:
         sys.stderr.write(errormsg + '\n')
@@ -94,20 +94,95 @@ def decode_header_param(msg, header, param):
                 msg.set_param(param, new_value, header)
 
 
-def decode_headers(msg):
-    "Decode message headers according to global options"
+def _get_exceptions(list):
+    return [x[1:].lower() for x in list[1:] if x[0]=='-']
 
-    for header in gopts.decode_headers:
-        decode_header(msg, header)
-
-    for header, param in gopts.decode_header_params:
-        decode_header_param(msg, header, param)
+def _decode_headers_params(msg, header, decode_all_params, param_list):
+    if decode_all_params:
+        params = msg.get_params(header=header)
+        if params:
+            for param, value in params:
+                if param not in param_list:
+                    decode_header_param(msg, header, param)
+    else:
+        for param in param_list:
+            decode_header_param(msg, header, param)
+
+def _remove_headers_params(msg, header, remove_all_params, param_list):
+    if remove_all_params:
+        params = msg.get_params(header=header)
+        if params:
+            if param_list:
+                for param, value in params:
+                    if param not in param_list:
+                        msg.del_param(param, header)
+            else:
+                value = msg[header]
+                if value is None: # No such header
+                    return
+                if ';' not in value: # There are no parameters
+                    return
+                del msg[header] # Delete all such headers
+                # Get the value without parameters and set it back
+                msg[header] = value.split(';')[0].strip()
+    else:
+        for param in param_list:
+            msg.del_param(param, header)
 
-    for header in gopts.remove_headers:
-        del msg[header]
+def decode_headers(msg):
+    "Decode message headers according to global options"
 
-    for header, param in gopts.remove_header_params:
-        msg.del_param(param, header)
+    for header_list in gopts.remove_headers:
+        header_list = header_list.split(',')
+        if header_list[0] == '*': # Remove all headers except listed
+            header_list = _get_exceptions(header_list)
+            for header in msg.keys():
+                if header.lower() not in header_list:
+                    del msg[header]
+        else: # Remove listed headers
+            for header in header_list:
+                del msg[header]
+
+    for header_list, param_list in gopts.remove_headers_params:
+        header_list = header_list.split(',')
+        param_list = param_list.split(',')
+        remove_all_params = param_list[0] == '*' # Remove all params except listed
+        if remove_all_params:
+            param_list = _get_exceptions(param_list)
+        if header_list[0] == '*': # Remove for all headers except listed
+            header_list = _get_exceptions(header_list)
+            for header in msg.keys():
+                if header.lower() not in header_list:
+                    _remove_headers_params(msg, header, remove_all_params, param_list)
+        else: # Decode for listed headers
+            for header in header_list:
+                _remove_headers_params(msg, header, remove_all_params, param_list)
+
+    for header_list in gopts.decode_headers:
+        header_list = header_list.split(',')
+        if header_list[0] == '*': # Decode all headers except listed
+            header_list = _get_exceptions(header_list)
+            for header in msg.keys():
+                if header.lower() not in header_list:
+                    decode_header(msg, header)
+        else: # Decode listed headers
+            for header in header_list:
+                decode_header(msg, header)
+
+    for header_list, param_list in gopts.decode_header_params:
+        header_list = header_list.split(',')
+        param_list = param_list.split(',')
+        decode_all_params = param_list[0] == '*' # Decode all params except listed
+        if decode_all_params:
+            param_list = _get_exceptions(param_list)
+        if header_list[0] == '*': # Decode for all headers except listed
+            header_list = _get_exceptions(header_list)
+            for header in msg.keys():
+                if header.lower() not in header_list:
+                    _decode_headers_params(msg, header, decode_all_params, param_list)
+        else: # Decode for listed headers
+            for header in header_list:
+                _decode_headers_params(msg, header, decode_all_params, param_list)
 
 
 def set_header(msg, header, value):
@@ -290,7 +365,7 @@ class GlobalOptions:
     # A list of headers to remove
     remove_headers = []
     # A list of headers parameters to remove
-    remove_header_params = []
+    remove_headers_params = []
 
     totext_mask = [] # A list of content-types to decode
     binary_mask = [] # A list to pass through
@@ -309,7 +384,7 @@ def get_opt():
     try:
         options, arguments = getopt(sys.argv[1:],
             'hVcCDPH:f:d:p:r:R:b:e:i:t:o:',
-            ['help', 'version', 'host'])
+            ['help', 'version', 'host='])
     except GetoptError:
         usage(1)
 
@@ -327,6 +402,8 @@ def get_opt():
         elif option == '-f':
             gopts.default_encoding = value
         elif option == '-d':
+            if value.startswith('*'):
+                gopts.decode_headers = []
             gopts.decode_headers.append(value)
         elif option == '-D':
             gopts.decode_headers = []
@@ -337,7 +414,7 @@ def get_opt():
         elif option == '-r':
             gopts.remove_headers.append(value)
         elif option == '-R':
-            gopts.remove_header_params.append(value.split(':', 1))
+            gopts.remove_headers_params.append(value.split(':', 1))
         elif option == '-t':
             gopts.totext_mask.append(value)
         elif option == '-b':