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All you need to know to load our calendars into your application (Google Calendar, iCal, Outlook, etc) and make sure they are synced regularly. Benvenuto Inserisci il tuo codice cliente, conferma la tua mail e richiedi l'accesso al portale ordini RMS. Codice: Email: Conferma Email: Username: Password. The Apache 2 Filter Architecture is the major innovation that sets it apart from other webservers, including Apache 1.x, as a uniquely powerful.
All directives using server config should use this, as other contexts are meaningless for a server config. Pre-Packaged Configuration Functions In general, as in the above example, we write our own function to implement a directive. In the common case of a directive that simply set a field in the directory config, we can use one of the pre-packaged functions: To use these fields, we need to pass the field to be set in the data pointer, so a declaration looks like: Note by anonymous, Tue Apr 5 The final topic we need to deal with is managing the configuration hierarchy: This is the purpose of the merge functions in the module struct.
A merge function is called whenever there are directives at more than one level in a hierarchy, starting at the top level of httpd. In the case of the per-directory config there may be several levels and thus several calls to a merge function, incorporating htaccess files if applicable as well as sections in httpd.
A merge function may also be NULL. In that case all directives in the less-specific container are discarded, so incremental configuration is not possible. Nevertheless, it is perfectly adequate for some modules.
Configuration for Modules
More typically, we want the merge function to honour directives set in the more specific container, but inherit values that are not explicitly set. This is where we need a merge function. Consider the following example: We need a merge function, which takes the generic form: Now our configuration is processed as follows: At the top level, a is set to and c to while b is unset.
The first merge sets b to Since a and c are not set overridden at this level, the previous values are inherited in the merge. The second merge sets the value of c overriding the previous setting, while inheriting the previous values of a and b. This is obviously a trivial merge function. Often we may need to do something a little more interesting: Provided the number of characters replaced is small in comparison to the total document size, this is much more efficient.
We encounter a character that needs replacing in the bucket We split the bucket before and after the character. Now we have three buckets: We drop the character, leaving the before and after buckets. We create a new bucket containing the replacement, and insert it where the character was.
The only actual data to change are the single character removed and the few bytes that replace it. When a text file is requested, it escapes the text as required for HTML, and displays it between the header and the footer.
It works by direct manipulation of buckets the lowest-level APIand demonstrates both insertion of file data and substitution of characters, without any allocation of moving of big blocks. Bucket functions Firstly we introduce two functions to deal with the data insertions: Creating a File bucket requires an open filehandle and a byte range within the file. Since we're transmitting the entire file, we just stat its size to set the byte range. We open it with a shared lock and with sendfile enabled for maximum performance.
The appropriate bucket type for such data is transient: We will discuss alternative formulations of the above below. The Filter Now the main filter itself is broadly straightforward, but there are a number of interesting and unexpected points to consider. Since this is a little longer than the above utility functions, we'll comment it inline instead.
When we encounter it, we insert the footer in front of it. We shouldn't get more than one EOS, but just in case we do we'll note having inserted the footer. That means we're being error-tolerant. Couldn't we have prepared four buckets in advance - one for each of the characters to be replaced - and then re-used them whenever the character occurred? The problem here is that each bucket is linked to its neighbours. So if we re-use the same bucket, we lose the links, so that the brigade now jumps over any data between the two instances of it.
Hence we do need a new bucket every time. That means this technique becomes inefficient when a high proportion of input data has to be changed. We will show alternative techniques for such cases in other articles. Note by anonymous, Mon May 12 There are several other bucket types suitable for different kinds of data and metadata. Note by anonymous, Sat May 17 But we noted that this bucket was not the most efficient way to escape a character.
The reason for this is that the transient memory has to be copied internally to prevent it going out of scope. A third variant on the same principle is the pool bucket. This refers to memory allocated on a pooland will have to be copied internally if and only if the pool is destroyed within the lifetime of the bucket.
Introduction to Buckets and Brigades
The Heap bucket The heap bucket is another form of in-memory bucket. But its usage is rather different from any of the above. We rarely if ever need to create a heap bucket explicitly: This API is discussed in other articles. External data buckets The File bucket, as we have already seen, enables us to insert a file or part file into the data stream.
Although we had to stat it to find its length, we didn't have to read it.Online Dating: A Woman's Perspective
If sendfile is enabled, the operating system through the APR can optimise sending the file.