Abstract: In one embodiment, a method includes facilitating placing an order by a buyer with a seller. The method includes selecting product recommendations for the buyer using a product recommendation model. The method includes causing an order tracking user interface corresponding to the order to be presented to the buyer on a user device of the buyer. The order tracking user interface includes interactive elements corresponding to a selected product recommendation. The method includes receiving, from the user device of the buyer, a selection of one of the interactive elements corresponding to a selected product recommendation. The method includes retrieving payment information for the buyer based on receiving the selection of the interactive element. The method includes automatically facilitating an order for the product corresponding to the selected interactive element based on the retrieved payment information for the buyer.

Abstract: In one embodiment, a method includes facilitating placing an order by a buyer with a seller. The method includes selecting product recommendations for the buyer using a product recommendation model. The method includes causing an order tracking user interface corresponding to the order to be presented to the buyer on a user device of the buyer. The order tracking user interface includes interactive elements corresponding to a selected product recommendation. The method includes receiving, from the user device of the buyer, a selection of one of the interactive elements corresponding to a selected product recommendation. The method includes retrieving payment information for the buyer based on receiving the selection of the interactive element. The method includes automatically facilitating an order for the product corresponding to the selected interactive element based on the retrieved payment information for the buyer.

Abstract: In particular embodiments, a method comprises accessing, by one or more computing systems associated with a social-networking system, a structured document of a network application, the structured document comprising structural information and content comprising one or more embedded scripts, resources, or identifiers for the resources. The method further comprises processing the structured document to generate a model representation of the structured document, executing at least some of the content of the structured document and logging multiple snapshots of the model representation of the structured document as the model representation is generated in response to one or more interactions initiated by execution of the content.

Abstract: In particular embodiments, a method comprises accessing, by one or more computing systems associated with a social-networking system, a structured document of a network application, the structured document comprising structural information and content comprising one or more embedded scripts, resources, or identifiers for the resources. The method further comprises processing the structured document to generate a model representation of the structured document, executing at least some of the content of the structured document and logging multiple snapshots of the model representation of the structured document as the model representation is generated in response to one or more interactions initiated by execution of the content.

Abstract: In one embodiment, a method includes accessing a structured document of a network application, processing the structured document to generate a model representation of the structured document, tracking one or more interactions occurring during the processing of the structured document, the one or more interactions including one or more outgoing requests transmitted by the one or more computing systems or incoming responses received by the one or more computing systems, and generating a behavior model of the web application based on one or more of the interactions.

Abstract: A method of operation of a URL spam detection system includes: identifying a feature dimension of a user action on a social networking system to detect anomalies; extracting URL chunks from a content associated with the user action; aggregating a non-content feature of the user action along the feature dimension into a URL distribution store to produce a feature distribution for each of the URL chunks; determining whether the feature distribution of a particular URL chunk within the URL chunks exceeds an expectation threshold for the feature dimension; and classifying the particular URL chunk as an illegitimate URL when the feature distribution exceeds the expectation threshold to restrict access to a particular URL chunk on a social networking system.

Abstract: A method of operation of a URL spam detection system includes: identifying a feature dimension of a user action on a social networking system to detect anomalies; extracting URL chunks from a content associated with the user action; aggregating a non-content feature of the user action along the feature dimension into a URL distribution store to produce a feature distribution for each of the URL chunks; determining whether the feature distribution of a particular URL chunk within the URL chunks exceeds an expectation threshold for the feature dimension; and classifying the particular URL chunk as an illegitimate URL when the feature distribution exceeds the expectation threshold to restrict access to a particular URL chunk on a social networking system.