Abstract: Disclosed are various embodiments for using data contracts in connection with network page generation code. A network page request is obtained from a client. Data is aggregated from multiple data sources in response to the request, and data is marshalled based at least in part on a data contract. Page generation code is executed to generate at least a portion of the network page in response to the request. The aggregated data is provided to the page generation code as one or more predefined variables. Access to the predefined variables by the page generation code complies with the data contract.

Abstract: Disclosed are various embodiments relating to data aggregation in network page generation, where the data aggregation employs multipart encoding. A request for a network page is obtained from a client. The network page is associated with a network site hosted by a hosting provider on behalf of a customer. Customer data is obtained from one or more data sources in response to the request. Each data source provides multiple data items using a multipart encoding. Page generation code supplied by the customer is executed to generate at least a portion of the network page in response to obtaining all of a subset of the customer data which is used by the page generation code. The page generation code is able to access the subset of the customer data as predefined variables.

Abstract: Disclosed are various embodiments that facilitate error handling in a network page generation environment. A request for a network page is obtained from a client. The network page is associated with a network site hosted by a hosting provider on behalf of a customer. Page generation code supplied by the customer is executed by a framework in response to the request. The page generation code is configured to generate at least a portion of the network page. A customized error network page is sent to the client in response to determining that an error has occurred in the framework that executes the page generation code.

Abstract: Disclosed are various embodiments for generating network pages using customer-supplied page generation code. A network page request is obtained from a client. The network page is associated with a network site hosted by a hosting provider on behalf of a customer. Customer data is aggregated from multiple data sources. Customer-supplied page generation code is executed to generate the network page. The page generation code may access the customer data through predefined variables, but the page generation code is restricted from accessing the data sources directly. The network page is sent to the client in response to the request.

Abstract: Disclosed are various embodiments for separating control of network sites through the use of a proxy server application. A proxy server application obtains a request for a network page associated with one customer out of several customers of an organization. Each of the customers has an online presence hosted in a trusted network. The trusted network is subject to security supervision by the same organization. It is determined whether the network page is within a customer-managed portion of the network site. The network page is obtained from an untrusted network that is not subject to security supervision by the organization when the network page is within the customer-managed portion of the network site.

Abstract: Disclosed are various embodiments for the mapping of behavior to data. Multiple behavior elements from a code library that are compatible with one or more data elements of a document are automatically determined according to a data contract associated with each one of the behavior elements. Each of the behavior elements is configured to consume one or more data elements and produce a network page feature according to a behavior. One or more of the behavior elements are selected automatically according to a plurality of rules, thereby producing one or more selected behavior elements. A mapping of the one or more selected behavior elements to the one or more data elements is automatically generated.